| /* |
| * QEMU VGA Emulator. |
| * |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/units.h" |
| #include "sysemu/reset.h" |
| #include "qapi/error.h" |
| #include "hw/display/vga.h" |
| #include "hw/pci/pci.h" |
| #include "vga_int.h" |
| #include "vga_regs.h" |
| #include "ui/pixel_ops.h" |
| #include "qemu/timer.h" |
| #include "hw/xen/xen.h" |
| #include "migration/vmstate.h" |
| #include "trace.h" |
| |
| //#define DEBUG_VGA_MEM |
| //#define DEBUG_VGA_REG |
| |
| /* 16 state changes per vertical frame @60 Hz */ |
| #define VGA_TEXT_CURSOR_PERIOD_MS (1000 * 2 * 16 / 60) |
| |
| /* |
| * Video Graphics Array (VGA) |
| * |
| * Chipset docs for original IBM VGA: |
| * http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf |
| * |
| * FreeVGA site: |
| * http://www.osdever.net/FreeVGA/home.htm |
| * |
| * Standard VGA features and Bochs VBE extensions are implemented. |
| */ |
| |
| /* force some bits to zero */ |
| const uint8_t sr_mask[8] = { |
| 0x03, |
| 0x3d, |
| 0x0f, |
| 0x3f, |
| 0x0e, |
| 0x00, |
| 0x00, |
| 0xff, |
| }; |
| |
| const uint8_t gr_mask[16] = { |
| 0x0f, /* 0x00 */ |
| 0x0f, /* 0x01 */ |
| 0x0f, /* 0x02 */ |
| 0x1f, /* 0x03 */ |
| 0x03, /* 0x04 */ |
| 0x7b, /* 0x05 */ |
| 0x0f, /* 0x06 */ |
| 0x0f, /* 0x07 */ |
| 0xff, /* 0x08 */ |
| 0x00, /* 0x09 */ |
| 0x00, /* 0x0a */ |
| 0x00, /* 0x0b */ |
| 0x00, /* 0x0c */ |
| 0x00, /* 0x0d */ |
| 0x00, /* 0x0e */ |
| 0x00, /* 0x0f */ |
| }; |
| |
| #define cbswap_32(__x) \ |
| ((uint32_t)( \ |
| (((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \ |
| (((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \ |
| (((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \ |
| (((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )) |
| |
| #ifdef HOST_WORDS_BIGENDIAN |
| #define PAT(x) cbswap_32(x) |
| #else |
| #define PAT(x) (x) |
| #endif |
| |
| #ifdef HOST_WORDS_BIGENDIAN |
| #define BIG 1 |
| #else |
| #define BIG 0 |
| #endif |
| |
| #ifdef HOST_WORDS_BIGENDIAN |
| #define GET_PLANE(data, p) (((data) >> (24 - (p) * 8)) & 0xff) |
| #else |
| #define GET_PLANE(data, p) (((data) >> ((p) * 8)) & 0xff) |
| #endif |
| |
| static const uint32_t mask16[16] = { |
| PAT(0x00000000), |
| PAT(0x000000ff), |
| PAT(0x0000ff00), |
| PAT(0x0000ffff), |
| PAT(0x00ff0000), |
| PAT(0x00ff00ff), |
| PAT(0x00ffff00), |
| PAT(0x00ffffff), |
| PAT(0xff000000), |
| PAT(0xff0000ff), |
| PAT(0xff00ff00), |
| PAT(0xff00ffff), |
| PAT(0xffff0000), |
| PAT(0xffff00ff), |
| PAT(0xffffff00), |
| PAT(0xffffffff), |
| }; |
| |
| #undef PAT |
| |
| #ifdef HOST_WORDS_BIGENDIAN |
| #define PAT(x) (x) |
| #else |
| #define PAT(x) cbswap_32(x) |
| #endif |
| |
| static uint32_t expand4[256]; |
| static uint16_t expand2[256]; |
| static uint8_t expand4to8[16]; |
| |
| static void vbe_update_vgaregs(VGACommonState *s); |
| |
| static inline bool vbe_enabled(VGACommonState *s) |
| { |
| return s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED; |
| } |
| |
| static inline uint8_t sr(VGACommonState *s, int idx) |
| { |
| return vbe_enabled(s) ? s->sr_vbe[idx] : s->sr[idx]; |
| } |
| |
| static void vga_update_memory_access(VGACommonState *s) |
| { |
| hwaddr base, offset, size; |
| |
| if (s->legacy_address_space == NULL) { |
| return; |
| } |
| |
| if (s->has_chain4_alias) { |
| memory_region_del_subregion(s->legacy_address_space, &s->chain4_alias); |
| object_unparent(OBJECT(&s->chain4_alias)); |
| s->has_chain4_alias = false; |
| s->plane_updated = 0xf; |
| } |
| if ((sr(s, VGA_SEQ_PLANE_WRITE) & VGA_SR02_ALL_PLANES) == |
| VGA_SR02_ALL_PLANES && sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { |
| offset = 0; |
| switch ((s->gr[VGA_GFX_MISC] >> 2) & 3) { |
| case 0: |
| base = 0xa0000; |
| size = 0x20000; |
| break; |
| case 1: |
| base = 0xa0000; |
| size = 0x10000; |
| offset = s->bank_offset; |
| break; |
| case 2: |
| base = 0xb0000; |
| size = 0x8000; |
| break; |
| case 3: |
| default: |
| base = 0xb8000; |
| size = 0x8000; |
| break; |
| } |
| assert(offset + size <= s->vram_size); |
| memory_region_init_alias(&s->chain4_alias, memory_region_owner(&s->vram), |
| "vga.chain4", &s->vram, offset, size); |
| memory_region_add_subregion_overlap(s->legacy_address_space, base, |
| &s->chain4_alias, 2); |
| s->has_chain4_alias = true; |
| } |
| } |
| |
| static void vga_dumb_update_retrace_info(VGACommonState *s) |
| { |
| (void) s; |
| } |
| |
| static void vga_precise_update_retrace_info(VGACommonState *s) |
| { |
| int htotal_chars; |
| int hretr_start_char; |
| int hretr_skew_chars; |
| int hretr_end_char; |
| |
| int vtotal_lines; |
| int vretr_start_line; |
| int vretr_end_line; |
| |
| int dots; |
| #if 0 |
| int div2, sldiv2; |
| #endif |
| int clocking_mode; |
| int clock_sel; |
| const int clk_hz[] = {25175000, 28322000, 25175000, 25175000}; |
| int64_t chars_per_sec; |
| struct vga_precise_retrace *r = &s->retrace_info.precise; |
| |
| htotal_chars = s->cr[VGA_CRTC_H_TOTAL] + 5; |
| hretr_start_char = s->cr[VGA_CRTC_H_SYNC_START]; |
| hretr_skew_chars = (s->cr[VGA_CRTC_H_SYNC_END] >> 5) & 3; |
| hretr_end_char = s->cr[VGA_CRTC_H_SYNC_END] & 0x1f; |
| |
| vtotal_lines = (s->cr[VGA_CRTC_V_TOTAL] | |
| (((s->cr[VGA_CRTC_OVERFLOW] & 1) | |
| ((s->cr[VGA_CRTC_OVERFLOW] >> 4) & 2)) << 8)) + 2; |
| vretr_start_line = s->cr[VGA_CRTC_V_SYNC_START] | |
| ((((s->cr[VGA_CRTC_OVERFLOW] >> 2) & 1) | |
| ((s->cr[VGA_CRTC_OVERFLOW] >> 6) & 2)) << 8); |
| vretr_end_line = s->cr[VGA_CRTC_V_SYNC_END] & 0xf; |
| |
| clocking_mode = (sr(s, VGA_SEQ_CLOCK_MODE) >> 3) & 1; |
| clock_sel = (s->msr >> 2) & 3; |
| dots = (s->msr & 1) ? 8 : 9; |
| |
| chars_per_sec = clk_hz[clock_sel] / dots; |
| |
| htotal_chars <<= clocking_mode; |
| |
| r->total_chars = vtotal_lines * htotal_chars; |
| if (r->freq) { |
| r->ticks_per_char = NANOSECONDS_PER_SECOND / (r->total_chars * r->freq); |
| } else { |
| r->ticks_per_char = NANOSECONDS_PER_SECOND / chars_per_sec; |
| } |
| |
| r->vstart = vretr_start_line; |
| r->vend = r->vstart + vretr_end_line + 1; |
| |
| r->hstart = hretr_start_char + hretr_skew_chars; |
| r->hend = r->hstart + hretr_end_char + 1; |
| r->htotal = htotal_chars; |
| |
| #if 0 |
| div2 = (s->cr[VGA_CRTC_MODE] >> 2) & 1; |
| sldiv2 = (s->cr[VGA_CRTC_MODE] >> 3) & 1; |
| printf ( |
| "hz=%f\n" |
| "htotal = %d\n" |
| "hretr_start = %d\n" |
| "hretr_skew = %d\n" |
| "hretr_end = %d\n" |
| "vtotal = %d\n" |
| "vretr_start = %d\n" |
| "vretr_end = %d\n" |
| "div2 = %d sldiv2 = %d\n" |
| "clocking_mode = %d\n" |
| "clock_sel = %d %d\n" |
| "dots = %d\n" |
| "ticks/char = %" PRId64 "\n" |
| "\n", |
| (double) NANOSECONDS_PER_SECOND / (r->ticks_per_char * r->total_chars), |
| htotal_chars, |
| hretr_start_char, |
| hretr_skew_chars, |
| hretr_end_char, |
| vtotal_lines, |
| vretr_start_line, |
| vretr_end_line, |
| div2, sldiv2, |
| clocking_mode, |
| clock_sel, |
| clk_hz[clock_sel], |
| dots, |
| r->ticks_per_char |
| ); |
| #endif |
| } |
| |
| static uint8_t vga_precise_retrace(VGACommonState *s) |
| { |
| struct vga_precise_retrace *r = &s->retrace_info.precise; |
| uint8_t val = s->st01 & ~(ST01_V_RETRACE | ST01_DISP_ENABLE); |
| |
| if (r->total_chars) { |
| int cur_line, cur_line_char, cur_char; |
| int64_t cur_tick; |
| |
| cur_tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| |
| cur_char = (cur_tick / r->ticks_per_char) % r->total_chars; |
| cur_line = cur_char / r->htotal; |
| |
| if (cur_line >= r->vstart && cur_line <= r->vend) { |
| val |= ST01_V_RETRACE | ST01_DISP_ENABLE; |
| } else { |
| cur_line_char = cur_char % r->htotal; |
| if (cur_line_char >= r->hstart && cur_line_char <= r->hend) { |
| val |= ST01_DISP_ENABLE; |
| } |
| } |
| |
| return val; |
| } else { |
| return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); |
| } |
| } |
| |
| static uint8_t vga_dumb_retrace(VGACommonState *s) |
| { |
| return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE); |
| } |
| |
| int vga_ioport_invalid(VGACommonState *s, uint32_t addr) |
| { |
| if (s->msr & VGA_MIS_COLOR) { |
| /* Color */ |
| return (addr >= 0x3b0 && addr <= 0x3bf); |
| } else { |
| /* Monochrome */ |
| return (addr >= 0x3d0 && addr <= 0x3df); |
| } |
| } |
| |
| uint32_t vga_ioport_read(void *opaque, uint32_t addr) |
| { |
| VGACommonState *s = opaque; |
| int val, index; |
| |
| if (vga_ioport_invalid(s, addr)) { |
| val = 0xff; |
| } else { |
| switch(addr) { |
| case VGA_ATT_W: |
| if (s->ar_flip_flop == 0) { |
| val = s->ar_index; |
| } else { |
| val = 0; |
| } |
| break; |
| case VGA_ATT_R: |
| index = s->ar_index & 0x1f; |
| if (index < VGA_ATT_C) { |
| val = s->ar[index]; |
| } else { |
| val = 0; |
| } |
| break; |
| case VGA_MIS_W: |
| val = s->st00; |
| break; |
| case VGA_SEQ_I: |
| val = s->sr_index; |
| break; |
| case VGA_SEQ_D: |
| val = s->sr[s->sr_index]; |
| #ifdef DEBUG_VGA_REG |
| printf("vga: read SR%x = 0x%02x\n", s->sr_index, val); |
| #endif |
| break; |
| case VGA_PEL_IR: |
| val = s->dac_state; |
| break; |
| case VGA_PEL_IW: |
| val = s->dac_write_index; |
| break; |
| case VGA_PEL_D: |
| val = s->palette[s->dac_read_index * 3 + s->dac_sub_index]; |
| if (++s->dac_sub_index == 3) { |
| s->dac_sub_index = 0; |
| s->dac_read_index++; |
| } |
| break; |
| case VGA_FTC_R: |
| val = s->fcr; |
| break; |
| case VGA_MIS_R: |
| val = s->msr; |
| break; |
| case VGA_GFX_I: |
| val = s->gr_index; |
| break; |
| case VGA_GFX_D: |
| val = s->gr[s->gr_index]; |
| #ifdef DEBUG_VGA_REG |
| printf("vga: read GR%x = 0x%02x\n", s->gr_index, val); |
| #endif |
| break; |
| case VGA_CRT_IM: |
| case VGA_CRT_IC: |
| val = s->cr_index; |
| break; |
| case VGA_CRT_DM: |
| case VGA_CRT_DC: |
| val = s->cr[s->cr_index]; |
| #ifdef DEBUG_VGA_REG |
| printf("vga: read CR%x = 0x%02x\n", s->cr_index, val); |
| #endif |
| break; |
| case VGA_IS1_RM: |
| case VGA_IS1_RC: |
| /* just toggle to fool polling */ |
| val = s->st01 = s->retrace(s); |
| s->ar_flip_flop = 0; |
| break; |
| default: |
| val = 0x00; |
| break; |
| } |
| } |
| trace_vga_std_read_io(addr, val); |
| return val; |
| } |
| |
| void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
| { |
| VGACommonState *s = opaque; |
| int index; |
| |
| /* check port range access depending on color/monochrome mode */ |
| if (vga_ioport_invalid(s, addr)) { |
| return; |
| } |
| trace_vga_std_write_io(addr, val); |
| |
| switch(addr) { |
| case VGA_ATT_W: |
| if (s->ar_flip_flop == 0) { |
| val &= 0x3f; |
| s->ar_index = val; |
| } else { |
| index = s->ar_index & 0x1f; |
| switch(index) { |
| case VGA_ATC_PALETTE0 ... VGA_ATC_PALETTEF: |
| s->ar[index] = val & 0x3f; |
| break; |
| case VGA_ATC_MODE: |
| s->ar[index] = val & ~0x10; |
| break; |
| case VGA_ATC_OVERSCAN: |
| s->ar[index] = val; |
| break; |
| case VGA_ATC_PLANE_ENABLE: |
| s->ar[index] = val & ~0xc0; |
| break; |
| case VGA_ATC_PEL: |
| s->ar[index] = val & ~0xf0; |
| break; |
| case VGA_ATC_COLOR_PAGE: |
| s->ar[index] = val & ~0xf0; |
| break; |
| default: |
| break; |
| } |
| } |
| s->ar_flip_flop ^= 1; |
| break; |
| case VGA_MIS_W: |
| s->msr = val & ~0x10; |
| s->update_retrace_info(s); |
| break; |
| case VGA_SEQ_I: |
| s->sr_index = val & 7; |
| break; |
| case VGA_SEQ_D: |
| #ifdef DEBUG_VGA_REG |
| printf("vga: write SR%x = 0x%02x\n", s->sr_index, val); |
| #endif |
| s->sr[s->sr_index] = val & sr_mask[s->sr_index]; |
| if (s->sr_index == VGA_SEQ_CLOCK_MODE) { |
| s->update_retrace_info(s); |
| } |
| vga_update_memory_access(s); |
| break; |
| case VGA_PEL_IR: |
| s->dac_read_index = val; |
| s->dac_sub_index = 0; |
| s->dac_state = 3; |
| break; |
| case VGA_PEL_IW: |
| s->dac_write_index = val; |
| s->dac_sub_index = 0; |
| s->dac_state = 0; |
| break; |
| case VGA_PEL_D: |
| s->dac_cache[s->dac_sub_index] = val; |
| if (++s->dac_sub_index == 3) { |
| memcpy(&s->palette[s->dac_write_index * 3], s->dac_cache, 3); |
| s->dac_sub_index = 0; |
| s->dac_write_index++; |
| } |
| break; |
| case VGA_GFX_I: |
| s->gr_index = val & 0x0f; |
| break; |
| case VGA_GFX_D: |
| #ifdef DEBUG_VGA_REG |
| printf("vga: write GR%x = 0x%02x\n", s->gr_index, val); |
| #endif |
| s->gr[s->gr_index] = val & gr_mask[s->gr_index]; |
| vbe_update_vgaregs(s); |
| vga_update_memory_access(s); |
| break; |
| case VGA_CRT_IM: |
| case VGA_CRT_IC: |
| s->cr_index = val; |
| break; |
| case VGA_CRT_DM: |
| case VGA_CRT_DC: |
| #ifdef DEBUG_VGA_REG |
| printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); |
| #endif |
| /* handle CR0-7 protection */ |
| if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) && |
| s->cr_index <= VGA_CRTC_OVERFLOW) { |
| /* can always write bit 4 of CR7 */ |
| if (s->cr_index == VGA_CRTC_OVERFLOW) { |
| s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) | |
| (val & 0x10); |
| vbe_update_vgaregs(s); |
| } |
| return; |
| } |
| s->cr[s->cr_index] = val; |
| vbe_update_vgaregs(s); |
| |
| switch(s->cr_index) { |
| case VGA_CRTC_H_TOTAL: |
| case VGA_CRTC_H_SYNC_START: |
| case VGA_CRTC_H_SYNC_END: |
| case VGA_CRTC_V_TOTAL: |
| case VGA_CRTC_OVERFLOW: |
| case VGA_CRTC_V_SYNC_END: |
| case VGA_CRTC_MODE: |
| s->update_retrace_info(s); |
| break; |
| } |
| break; |
| case VGA_IS1_RM: |
| case VGA_IS1_RC: |
| s->fcr = val & 0x10; |
| break; |
| } |
| } |
| |
| /* |
| * Sanity check vbe register writes. |
| * |
| * As we don't have a way to signal errors to the guest in the bochs |
| * dispi interface we'll go adjust the registers to the closest valid |
| * value. |
| */ |
| static void vbe_fixup_regs(VGACommonState *s) |
| { |
| uint16_t *r = s->vbe_regs; |
| uint32_t bits, linelength, maxy, offset; |
| |
| if (!vbe_enabled(s)) { |
| /* vbe is turned off -- nothing to do */ |
| return; |
| } |
| |
| /* check depth */ |
| switch (r[VBE_DISPI_INDEX_BPP]) { |
| case 4: |
| case 8: |
| case 16: |
| case 24: |
| case 32: |
| bits = r[VBE_DISPI_INDEX_BPP]; |
| break; |
| case 15: |
| bits = 16; |
| break; |
| default: |
| bits = r[VBE_DISPI_INDEX_BPP] = 8; |
| break; |
| } |
| |
| /* check width */ |
| r[VBE_DISPI_INDEX_XRES] &= ~7u; |
| if (r[VBE_DISPI_INDEX_XRES] == 0) { |
| r[VBE_DISPI_INDEX_XRES] = 8; |
| } |
| if (r[VBE_DISPI_INDEX_XRES] > VBE_DISPI_MAX_XRES) { |
| r[VBE_DISPI_INDEX_XRES] = VBE_DISPI_MAX_XRES; |
| } |
| r[VBE_DISPI_INDEX_VIRT_WIDTH] &= ~7u; |
| if (r[VBE_DISPI_INDEX_VIRT_WIDTH] > VBE_DISPI_MAX_XRES) { |
| r[VBE_DISPI_INDEX_VIRT_WIDTH] = VBE_DISPI_MAX_XRES; |
| } |
| if (r[VBE_DISPI_INDEX_VIRT_WIDTH] < r[VBE_DISPI_INDEX_XRES]) { |
| r[VBE_DISPI_INDEX_VIRT_WIDTH] = r[VBE_DISPI_INDEX_XRES]; |
| } |
| |
| /* check height */ |
| linelength = r[VBE_DISPI_INDEX_VIRT_WIDTH] * bits / 8; |
| maxy = s->vbe_size / linelength; |
| if (r[VBE_DISPI_INDEX_YRES] == 0) { |
| r[VBE_DISPI_INDEX_YRES] = 1; |
| } |
| if (r[VBE_DISPI_INDEX_YRES] > VBE_DISPI_MAX_YRES) { |
| r[VBE_DISPI_INDEX_YRES] = VBE_DISPI_MAX_YRES; |
| } |
| if (r[VBE_DISPI_INDEX_YRES] > maxy) { |
| r[VBE_DISPI_INDEX_YRES] = maxy; |
| } |
| |
| /* check offset */ |
| if (r[VBE_DISPI_INDEX_X_OFFSET] > VBE_DISPI_MAX_XRES) { |
| r[VBE_DISPI_INDEX_X_OFFSET] = VBE_DISPI_MAX_XRES; |
| } |
| if (r[VBE_DISPI_INDEX_Y_OFFSET] > VBE_DISPI_MAX_YRES) { |
| r[VBE_DISPI_INDEX_Y_OFFSET] = VBE_DISPI_MAX_YRES; |
| } |
| offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; |
| offset += r[VBE_DISPI_INDEX_Y_OFFSET] * linelength; |
| if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { |
| r[VBE_DISPI_INDEX_Y_OFFSET] = 0; |
| offset = r[VBE_DISPI_INDEX_X_OFFSET] * bits / 8; |
| if (offset + r[VBE_DISPI_INDEX_YRES] * linelength > s->vbe_size) { |
| r[VBE_DISPI_INDEX_X_OFFSET] = 0; |
| offset = 0; |
| } |
| } |
| |
| /* update vga state */ |
| r[VBE_DISPI_INDEX_VIRT_HEIGHT] = maxy; |
| s->vbe_line_offset = linelength; |
| s->vbe_start_addr = offset / 4; |
| } |
| |
| /* we initialize the VGA graphic mode */ |
| static void vbe_update_vgaregs(VGACommonState *s) |
| { |
| int h, shift_control; |
| |
| if (!vbe_enabled(s)) { |
| /* vbe is turned off -- nothing to do */ |
| return; |
| } |
| |
| /* graphic mode + memory map 1 */ |
| s->gr[VGA_GFX_MISC] = (s->gr[VGA_GFX_MISC] & ~0x0c) | 0x04 | |
| VGA_GR06_GRAPHICS_MODE; |
| s->cr[VGA_CRTC_MODE] |= 3; /* no CGA modes */ |
| s->cr[VGA_CRTC_OFFSET] = s->vbe_line_offset >> 3; |
| /* width */ |
| s->cr[VGA_CRTC_H_DISP] = |
| (s->vbe_regs[VBE_DISPI_INDEX_XRES] >> 3) - 1; |
| /* height (only meaningful if < 1024) */ |
| h = s->vbe_regs[VBE_DISPI_INDEX_YRES] - 1; |
| s->cr[VGA_CRTC_V_DISP_END] = h; |
| s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x42) | |
| ((h >> 7) & 0x02) | ((h >> 3) & 0x40); |
| /* line compare to 1023 */ |
| s->cr[VGA_CRTC_LINE_COMPARE] = 0xff; |
| s->cr[VGA_CRTC_OVERFLOW] |= 0x10; |
| s->cr[VGA_CRTC_MAX_SCAN] |= 0x40; |
| |
| if (s->vbe_regs[VBE_DISPI_INDEX_BPP] == 4) { |
| shift_control = 0; |
| s->sr_vbe[VGA_SEQ_CLOCK_MODE] &= ~8; /* no double line */ |
| } else { |
| shift_control = 2; |
| /* set chain 4 mode */ |
| s->sr_vbe[VGA_SEQ_MEMORY_MODE] |= VGA_SR04_CHN_4M; |
| /* activate all planes */ |
| s->sr_vbe[VGA_SEQ_PLANE_WRITE] |= VGA_SR02_ALL_PLANES; |
| } |
| s->gr[VGA_GFX_MODE] = (s->gr[VGA_GFX_MODE] & ~0x60) | |
| (shift_control << 5); |
| s->cr[VGA_CRTC_MAX_SCAN] &= ~0x9f; /* no double scan */ |
| } |
| |
| static uint32_t vbe_ioport_read_index(void *opaque, uint32_t addr) |
| { |
| VGACommonState *s = opaque; |
| return s->vbe_index; |
| } |
| |
| uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr) |
| { |
| VGACommonState *s = opaque; |
| uint32_t val; |
| |
| if (s->vbe_index < VBE_DISPI_INDEX_NB) { |
| if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_GETCAPS) { |
| switch(s->vbe_index) { |
| /* XXX: do not hardcode ? */ |
| case VBE_DISPI_INDEX_XRES: |
| val = VBE_DISPI_MAX_XRES; |
| break; |
| case VBE_DISPI_INDEX_YRES: |
| val = VBE_DISPI_MAX_YRES; |
| break; |
| case VBE_DISPI_INDEX_BPP: |
| val = VBE_DISPI_MAX_BPP; |
| break; |
| default: |
| val = s->vbe_regs[s->vbe_index]; |
| break; |
| } |
| } else { |
| val = s->vbe_regs[s->vbe_index]; |
| } |
| } else if (s->vbe_index == VBE_DISPI_INDEX_VIDEO_MEMORY_64K) { |
| val = s->vbe_size / (64 * KiB); |
| } else { |
| val = 0; |
| } |
| trace_vga_vbe_read(s->vbe_index, val); |
| return val; |
| } |
| |
| void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val) |
| { |
| VGACommonState *s = opaque; |
| s->vbe_index = val; |
| } |
| |
| void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val) |
| { |
| VGACommonState *s = opaque; |
| |
| if (s->vbe_index <= VBE_DISPI_INDEX_NB) { |
| trace_vga_vbe_write(s->vbe_index, val); |
| switch(s->vbe_index) { |
| case VBE_DISPI_INDEX_ID: |
| if (val == VBE_DISPI_ID0 || |
| val == VBE_DISPI_ID1 || |
| val == VBE_DISPI_ID2 || |
| val == VBE_DISPI_ID3 || |
| val == VBE_DISPI_ID4) { |
| s->vbe_regs[s->vbe_index] = val; |
| } |
| break; |
| case VBE_DISPI_INDEX_XRES: |
| case VBE_DISPI_INDEX_YRES: |
| case VBE_DISPI_INDEX_BPP: |
| case VBE_DISPI_INDEX_VIRT_WIDTH: |
| case VBE_DISPI_INDEX_X_OFFSET: |
| case VBE_DISPI_INDEX_Y_OFFSET: |
| s->vbe_regs[s->vbe_index] = val; |
| vbe_fixup_regs(s); |
| vbe_update_vgaregs(s); |
| break; |
| case VBE_DISPI_INDEX_BANK: |
| val &= s->vbe_bank_mask; |
| s->vbe_regs[s->vbe_index] = val; |
| s->bank_offset = (val << 16); |
| vga_update_memory_access(s); |
| break; |
| case VBE_DISPI_INDEX_ENABLE: |
| if ((val & VBE_DISPI_ENABLED) && |
| !(s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED)) { |
| |
| s->vbe_regs[VBE_DISPI_INDEX_VIRT_WIDTH] = 0; |
| s->vbe_regs[VBE_DISPI_INDEX_X_OFFSET] = 0; |
| s->vbe_regs[VBE_DISPI_INDEX_Y_OFFSET] = 0; |
| s->vbe_regs[VBE_DISPI_INDEX_ENABLE] |= VBE_DISPI_ENABLED; |
| vbe_fixup_regs(s); |
| vbe_update_vgaregs(s); |
| |
| /* clear the screen */ |
| if (!(val & VBE_DISPI_NOCLEARMEM)) { |
| memset(s->vram_ptr, 0, |
| s->vbe_regs[VBE_DISPI_INDEX_YRES] * s->vbe_line_offset); |
| } |
| } else { |
| s->bank_offset = 0; |
| } |
| s->dac_8bit = (val & VBE_DISPI_8BIT_DAC) > 0; |
| s->vbe_regs[s->vbe_index] = val; |
| vga_update_memory_access(s); |
| break; |
| default: |
| break; |
| } |
| } |
| } |
| |
| /* called for accesses between 0xa0000 and 0xc0000 */ |
| uint32_t vga_mem_readb(VGACommonState *s, hwaddr addr) |
| { |
| int memory_map_mode, plane; |
| uint32_t ret; |
| |
| /* convert to VGA memory offset */ |
| memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; |
| addr &= 0x1ffff; |
| switch(memory_map_mode) { |
| case 0: |
| break; |
| case 1: |
| if (addr >= 0x10000) |
| return 0xff; |
| addr += s->bank_offset; |
| break; |
| case 2: |
| addr -= 0x10000; |
| if (addr >= 0x8000) |
| return 0xff; |
| break; |
| default: |
| case 3: |
| addr -= 0x18000; |
| if (addr >= 0x8000) |
| return 0xff; |
| break; |
| } |
| |
| if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { |
| /* chain 4 mode : simplest access */ |
| assert(addr < s->vram_size); |
| ret = s->vram_ptr[addr]; |
| } else if (s->gr[VGA_GFX_MODE] & 0x10) { |
| /* odd/even mode (aka text mode mapping) */ |
| plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); |
| addr = ((addr & ~1) << 1) | plane; |
| if (addr >= s->vram_size) { |
| return 0xff; |
| } |
| ret = s->vram_ptr[addr]; |
| } else { |
| /* standard VGA latched access */ |
| if (addr * sizeof(uint32_t) >= s->vram_size) { |
| return 0xff; |
| } |
| s->latch = ((uint32_t *)s->vram_ptr)[addr]; |
| |
| if (!(s->gr[VGA_GFX_MODE] & 0x08)) { |
| /* read mode 0 */ |
| plane = s->gr[VGA_GFX_PLANE_READ]; |
| ret = GET_PLANE(s->latch, plane); |
| } else { |
| /* read mode 1 */ |
| ret = (s->latch ^ mask16[s->gr[VGA_GFX_COMPARE_VALUE]]) & |
| mask16[s->gr[VGA_GFX_COMPARE_MASK]]; |
| ret |= ret >> 16; |
| ret |= ret >> 8; |
| ret = (~ret) & 0xff; |
| } |
| } |
| return ret; |
| } |
| |
| /* called for accesses between 0xa0000 and 0xc0000 */ |
| void vga_mem_writeb(VGACommonState *s, hwaddr addr, uint32_t val) |
| { |
| int memory_map_mode, plane, write_mode, b, func_select, mask; |
| uint32_t write_mask, bit_mask, set_mask; |
| |
| #ifdef DEBUG_VGA_MEM |
| printf("vga: [0x" TARGET_FMT_plx "] = 0x%02x\n", addr, val); |
| #endif |
| /* convert to VGA memory offset */ |
| memory_map_mode = (s->gr[VGA_GFX_MISC] >> 2) & 3; |
| addr &= 0x1ffff; |
| switch(memory_map_mode) { |
| case 0: |
| break; |
| case 1: |
| if (addr >= 0x10000) |
| return; |
| addr += s->bank_offset; |
| break; |
| case 2: |
| addr -= 0x10000; |
| if (addr >= 0x8000) |
| return; |
| break; |
| default: |
| case 3: |
| addr -= 0x18000; |
| if (addr >= 0x8000) |
| return; |
| break; |
| } |
| |
| if (sr(s, VGA_SEQ_MEMORY_MODE) & VGA_SR04_CHN_4M) { |
| /* chain 4 mode : simplest access */ |
| plane = addr & 3; |
| mask = (1 << plane); |
| if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) { |
| assert(addr < s->vram_size); |
| s->vram_ptr[addr] = val; |
| #ifdef DEBUG_VGA_MEM |
| printf("vga: chain4: [0x" TARGET_FMT_plx "]\n", addr); |
| #endif |
| s->plane_updated |= mask; /* only used to detect font change */ |
| memory_region_set_dirty(&s->vram, addr, 1); |
| } |
| } else if (s->gr[VGA_GFX_MODE] & 0x10) { |
| /* odd/even mode (aka text mode mapping) */ |
| plane = (s->gr[VGA_GFX_PLANE_READ] & 2) | (addr & 1); |
| mask = (1 << plane); |
| if (sr(s, VGA_SEQ_PLANE_WRITE) & mask) { |
| addr = ((addr & ~1) << 1) | plane; |
| if (addr >= s->vram_size) { |
| return; |
| } |
| s->vram_ptr[addr] = val; |
| #ifdef DEBUG_VGA_MEM |
| printf("vga: odd/even: [0x" TARGET_FMT_plx "]\n", addr); |
| #endif |
| s->plane_updated |= mask; /* only used to detect font change */ |
| memory_region_set_dirty(&s->vram, addr, 1); |
| } |
| } else { |
| /* standard VGA latched access */ |
| write_mode = s->gr[VGA_GFX_MODE] & 3; |
| switch(write_mode) { |
| default: |
| case 0: |
| /* rotate */ |
| b = s->gr[VGA_GFX_DATA_ROTATE] & 7; |
| val = ((val >> b) | (val << (8 - b))) & 0xff; |
| val |= val << 8; |
| val |= val << 16; |
| |
| /* apply set/reset mask */ |
| set_mask = mask16[s->gr[VGA_GFX_SR_ENABLE]]; |
| val = (val & ~set_mask) | |
| (mask16[s->gr[VGA_GFX_SR_VALUE]] & set_mask); |
| bit_mask = s->gr[VGA_GFX_BIT_MASK]; |
| break; |
| case 1: |
| val = s->latch; |
| goto do_write; |
| case 2: |
| val = mask16[val & 0x0f]; |
| bit_mask = s->gr[VGA_GFX_BIT_MASK]; |
| break; |
| case 3: |
| /* rotate */ |
| b = s->gr[VGA_GFX_DATA_ROTATE] & 7; |
| val = (val >> b) | (val << (8 - b)); |
| |
| bit_mask = s->gr[VGA_GFX_BIT_MASK] & val; |
| val = mask16[s->gr[VGA_GFX_SR_VALUE]]; |
| break; |
| } |
| |
| /* apply logical operation */ |
| func_select = s->gr[VGA_GFX_DATA_ROTATE] >> 3; |
| switch(func_select) { |
| case 0: |
| default: |
| /* nothing to do */ |
| break; |
| case 1: |
| /* and */ |
| val &= s->latch; |
| break; |
| case 2: |
| /* or */ |
| val |= s->latch; |
| break; |
| case 3: |
| /* xor */ |
| val ^= s->latch; |
| break; |
| } |
| |
| /* apply bit mask */ |
| bit_mask |= bit_mask << 8; |
| bit_mask |= bit_mask << 16; |
| val = (val & bit_mask) | (s->latch & ~bit_mask); |
| |
| do_write: |
| /* mask data according to sr[2] */ |
| mask = sr(s, VGA_SEQ_PLANE_WRITE); |
| s->plane_updated |= mask; /* only used to detect font change */ |
| write_mask = mask16[mask]; |
| if (addr * sizeof(uint32_t) >= s->vram_size) { |
| return; |
| } |
| ((uint32_t *)s->vram_ptr)[addr] = |
| (((uint32_t *)s->vram_ptr)[addr] & ~write_mask) | |
| (val & write_mask); |
| #ifdef DEBUG_VGA_MEM |
| printf("vga: latch: [0x" TARGET_FMT_plx "] mask=0x%08x val=0x%08x\n", |
| addr * 4, write_mask, val); |
| #endif |
| memory_region_set_dirty(&s->vram, addr << 2, sizeof(uint32_t)); |
| } |
| } |
| |
| typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d, |
| uint32_t srcaddr, int width); |
| |
| #include "vga-access.h" |
| #include "vga-helpers.h" |
| |
| /* return true if the palette was modified */ |
| static int update_palette16(VGACommonState *s) |
| { |
| int full_update, i; |
| uint32_t v, col, *palette; |
| |
| full_update = 0; |
| palette = s->last_palette; |
| for(i = 0; i < 16; i++) { |
| v = s->ar[i]; |
| if (s->ar[VGA_ATC_MODE] & 0x80) { |
| v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xf) << 4) | (v & 0xf); |
| } else { |
| v = ((s->ar[VGA_ATC_COLOR_PAGE] & 0xc) << 4) | (v & 0x3f); |
| } |
| v = v * 3; |
| col = rgb_to_pixel32(c6_to_8(s->palette[v]), |
| c6_to_8(s->palette[v + 1]), |
| c6_to_8(s->palette[v + 2])); |
| if (col != palette[i]) { |
| full_update = 1; |
| palette[i] = col; |
| } |
| } |
| return full_update; |
| } |
| |
| /* return true if the palette was modified */ |
| static int update_palette256(VGACommonState *s) |
| { |
| int full_update, i; |
| uint32_t v, col, *palette; |
| |
| full_update = 0; |
| palette = s->last_palette; |
| v = 0; |
| for(i = 0; i < 256; i++) { |
| if (s->dac_8bit) { |
| col = rgb_to_pixel32(s->palette[v], |
| s->palette[v + 1], |
| s->palette[v + 2]); |
| } else { |
| col = rgb_to_pixel32(c6_to_8(s->palette[v]), |
| c6_to_8(s->palette[v + 1]), |
| c6_to_8(s->palette[v + 2])); |
| } |
| if (col != palette[i]) { |
| full_update = 1; |
| palette[i] = col; |
| } |
| v += 3; |
| } |
| return full_update; |
| } |
| |
| static void vga_get_offsets(VGACommonState *s, |
| uint32_t *pline_offset, |
| uint32_t *pstart_addr, |
| uint32_t *pline_compare) |
| { |
| uint32_t start_addr, line_offset, line_compare; |
| |
| if (vbe_enabled(s)) { |
| line_offset = s->vbe_line_offset; |
| start_addr = s->vbe_start_addr; |
| line_compare = 65535; |
| } else { |
| /* compute line_offset in bytes */ |
| line_offset = s->cr[VGA_CRTC_OFFSET]; |
| line_offset <<= 3; |
| |
| /* starting address */ |
| start_addr = s->cr[VGA_CRTC_START_LO] | |
| (s->cr[VGA_CRTC_START_HI] << 8); |
| |
| /* line compare */ |
| line_compare = s->cr[VGA_CRTC_LINE_COMPARE] | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x10) << 4) | |
| ((s->cr[VGA_CRTC_MAX_SCAN] & 0x40) << 3); |
| } |
| *pline_offset = line_offset; |
| *pstart_addr = start_addr; |
| *pline_compare = line_compare; |
| } |
| |
| /* update start_addr and line_offset. Return TRUE if modified */ |
| static int update_basic_params(VGACommonState *s) |
| { |
| int full_update; |
| uint32_t start_addr, line_offset, line_compare; |
| |
| full_update = 0; |
| |
| s->get_offsets(s, &line_offset, &start_addr, &line_compare); |
| |
| if (line_offset != s->line_offset || |
| start_addr != s->start_addr || |
| line_compare != s->line_compare) { |
| s->line_offset = line_offset; |
| s->start_addr = start_addr; |
| s->line_compare = line_compare; |
| full_update = 1; |
| } |
| return full_update; |
| } |
| |
| |
| static const uint8_t cursor_glyph[32 * 4] = { |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| }; |
| |
| static void vga_get_text_resolution(VGACommonState *s, int *pwidth, int *pheight, |
| int *pcwidth, int *pcheight) |
| { |
| int width, cwidth, height, cheight; |
| |
| /* total width & height */ |
| cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; |
| cwidth = 8; |
| if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) { |
| cwidth = 9; |
| } |
| if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) { |
| cwidth = 16; /* NOTE: no 18 pixel wide */ |
| } |
| width = (s->cr[VGA_CRTC_H_DISP] + 1); |
| if (s->cr[VGA_CRTC_V_TOTAL] == 100) { |
| /* ugly hack for CGA 160x100x16 - explain me the logic */ |
| height = 100; |
| } else { |
| height = s->cr[VGA_CRTC_V_DISP_END] | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); |
| height = (height + 1) / cheight; |
| } |
| |
| *pwidth = width; |
| *pheight = height; |
| *pcwidth = cwidth; |
| *pcheight = cheight; |
| } |
| |
| /* |
| * Text mode update |
| * Missing: |
| * - double scan |
| * - double width |
| * - underline |
| * - flashing |
| */ |
| static void vga_draw_text(VGACommonState *s, int full_update) |
| { |
| DisplaySurface *surface = qemu_console_surface(s->con); |
| int cx, cy, cheight, cw, ch, cattr, height, width, ch_attr; |
| int cx_min, cx_max, linesize, x_incr, line, line1; |
| uint32_t offset, fgcol, bgcol, v, cursor_offset; |
| uint8_t *d1, *d, *src, *dest, *cursor_ptr; |
| const uint8_t *font_ptr, *font_base[2]; |
| int dup9, line_offset; |
| uint32_t *palette; |
| uint32_t *ch_attr_ptr; |
| int64_t now = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); |
| |
| /* compute font data address (in plane 2) */ |
| v = sr(s, VGA_SEQ_CHARACTER_MAP); |
| offset = (((v >> 4) & 1) | ((v << 1) & 6)) * 8192 * 4 + 2; |
| if (offset != s->font_offsets[0]) { |
| s->font_offsets[0] = offset; |
| full_update = 1; |
| } |
| font_base[0] = s->vram_ptr + offset; |
| |
| offset = (((v >> 5) & 1) | ((v >> 1) & 6)) * 8192 * 4 + 2; |
| font_base[1] = s->vram_ptr + offset; |
| if (offset != s->font_offsets[1]) { |
| s->font_offsets[1] = offset; |
| full_update = 1; |
| } |
| if (s->plane_updated & (1 << 2) || s->has_chain4_alias) { |
| /* if the plane 2 was modified since the last display, it |
| indicates the font may have been modified */ |
| s->plane_updated = 0; |
| full_update = 1; |
| } |
| full_update |= update_basic_params(s); |
| |
| line_offset = s->line_offset; |
| |
| vga_get_text_resolution(s, &width, &height, &cw, &cheight); |
| if ((height * width) <= 1) { |
| /* better than nothing: exit if transient size is too small */ |
| return; |
| } |
| if ((height * width) > CH_ATTR_SIZE) { |
| /* better than nothing: exit if transient size is too big */ |
| return; |
| } |
| |
| if (width != s->last_width || height != s->last_height || |
| cw != s->last_cw || cheight != s->last_ch || s->last_depth) { |
| s->last_scr_width = width * cw; |
| s->last_scr_height = height * cheight; |
| qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); |
| surface = qemu_console_surface(s->con); |
| dpy_text_resize(s->con, width, height); |
| s->last_depth = 0; |
| s->last_width = width; |
| s->last_height = height; |
| s->last_ch = cheight; |
| s->last_cw = cw; |
| full_update = 1; |
| } |
| full_update |= update_palette16(s); |
| palette = s->last_palette; |
| x_incr = cw * surface_bytes_per_pixel(surface); |
| |
| if (full_update) { |
| s->full_update_text = 1; |
| } |
| if (s->full_update_gfx) { |
| s->full_update_gfx = 0; |
| full_update |= 1; |
| } |
| |
| cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | |
| s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr; |
| if (cursor_offset != s->cursor_offset || |
| s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || |
| s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end) { |
| /* if the cursor position changed, we update the old and new |
| chars */ |
| if (s->cursor_offset < CH_ATTR_SIZE) |
| s->last_ch_attr[s->cursor_offset] = -1; |
| if (cursor_offset < CH_ATTR_SIZE) |
| s->last_ch_attr[cursor_offset] = -1; |
| s->cursor_offset = cursor_offset; |
| s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; |
| s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; |
| } |
| cursor_ptr = s->vram_ptr + (s->start_addr + cursor_offset) * 4; |
| if (now >= s->cursor_blink_time) { |
| s->cursor_blink_time = now + VGA_TEXT_CURSOR_PERIOD_MS / 2; |
| s->cursor_visible_phase = !s->cursor_visible_phase; |
| } |
| |
| dest = surface_data(surface); |
| linesize = surface_stride(surface); |
| ch_attr_ptr = s->last_ch_attr; |
| line = 0; |
| offset = s->start_addr * 4; |
| for(cy = 0; cy < height; cy++) { |
| d1 = dest; |
| src = s->vram_ptr + offset; |
| cx_min = width; |
| cx_max = -1; |
| for(cx = 0; cx < width; cx++) { |
| if (src + sizeof(uint16_t) > s->vram_ptr + s->vram_size) { |
| break; |
| } |
| ch_attr = *(uint16_t *)src; |
| if (full_update || ch_attr != *ch_attr_ptr || src == cursor_ptr) { |
| if (cx < cx_min) |
| cx_min = cx; |
| if (cx > cx_max) |
| cx_max = cx; |
| *ch_attr_ptr = ch_attr; |
| #ifdef HOST_WORDS_BIGENDIAN |
| ch = ch_attr >> 8; |
| cattr = ch_attr & 0xff; |
| #else |
| ch = ch_attr & 0xff; |
| cattr = ch_attr >> 8; |
| #endif |
| font_ptr = font_base[(cattr >> 3) & 1]; |
| font_ptr += 32 * 4 * ch; |
| bgcol = palette[cattr >> 4]; |
| fgcol = palette[cattr & 0x0f]; |
| if (cw == 16) { |
| vga_draw_glyph16(d1, linesize, |
| font_ptr, cheight, fgcol, bgcol); |
| } else if (cw != 9) { |
| vga_draw_glyph8(d1, linesize, |
| font_ptr, cheight, fgcol, bgcol); |
| } else { |
| dup9 = 0; |
| if (ch >= 0xb0 && ch <= 0xdf && |
| (s->ar[VGA_ATC_MODE] & 0x04)) { |
| dup9 = 1; |
| } |
| vga_draw_glyph9(d1, linesize, |
| font_ptr, cheight, fgcol, bgcol, dup9); |
| } |
| if (src == cursor_ptr && |
| !(s->cr[VGA_CRTC_CURSOR_START] & 0x20) && |
| s->cursor_visible_phase) { |
| int line_start, line_last, h; |
| /* draw the cursor */ |
| line_start = s->cr[VGA_CRTC_CURSOR_START] & 0x1f; |
| line_last = s->cr[VGA_CRTC_CURSOR_END] & 0x1f; |
| /* XXX: check that */ |
| if (line_last > cheight - 1) |
| line_last = cheight - 1; |
| if (line_last >= line_start && line_start < cheight) { |
| h = line_last - line_start + 1; |
| d = d1 + linesize * line_start; |
| if (cw == 16) { |
| vga_draw_glyph16(d, linesize, |
| cursor_glyph, h, fgcol, bgcol); |
| } else if (cw != 9) { |
| vga_draw_glyph8(d, linesize, |
| cursor_glyph, h, fgcol, bgcol); |
| } else { |
| vga_draw_glyph9(d, linesize, |
| cursor_glyph, h, fgcol, bgcol, 1); |
| } |
| } |
| } |
| } |
| d1 += x_incr; |
| src += 4; |
| ch_attr_ptr++; |
| } |
| if (cx_max != -1) { |
| dpy_gfx_update(s->con, cx_min * cw, cy * cheight, |
| (cx_max - cx_min + 1) * cw, cheight); |
| } |
| dest += linesize * cheight; |
| line1 = line + cheight; |
| offset += line_offset; |
| if (line < s->line_compare && line1 >= s->line_compare) { |
| offset = 0; |
| } |
| line = line1; |
| } |
| } |
| |
| enum { |
| VGA_DRAW_LINE2, |
| VGA_DRAW_LINE2D2, |
| VGA_DRAW_LINE4, |
| VGA_DRAW_LINE4D2, |
| VGA_DRAW_LINE8D2, |
| VGA_DRAW_LINE8, |
| VGA_DRAW_LINE15_LE, |
| VGA_DRAW_LINE16_LE, |
| VGA_DRAW_LINE24_LE, |
| VGA_DRAW_LINE32_LE, |
| VGA_DRAW_LINE15_BE, |
| VGA_DRAW_LINE16_BE, |
| VGA_DRAW_LINE24_BE, |
| VGA_DRAW_LINE32_BE, |
| VGA_DRAW_LINE_NB, |
| }; |
| |
| static vga_draw_line_func * const vga_draw_line_table[VGA_DRAW_LINE_NB] = { |
| vga_draw_line2, |
| vga_draw_line2d2, |
| vga_draw_line4, |
| vga_draw_line4d2, |
| vga_draw_line8d2, |
| vga_draw_line8, |
| vga_draw_line15_le, |
| vga_draw_line16_le, |
| vga_draw_line24_le, |
| vga_draw_line32_le, |
| vga_draw_line15_be, |
| vga_draw_line16_be, |
| vga_draw_line24_be, |
| vga_draw_line32_be, |
| }; |
| |
| static int vga_get_bpp(VGACommonState *s) |
| { |
| int ret; |
| |
| if (vbe_enabled(s)) { |
| ret = s->vbe_regs[VBE_DISPI_INDEX_BPP]; |
| } else { |
| ret = 0; |
| } |
| return ret; |
| } |
| |
| static void vga_get_resolution(VGACommonState *s, int *pwidth, int *pheight) |
| { |
| int width, height; |
| |
| if (vbe_enabled(s)) { |
| width = s->vbe_regs[VBE_DISPI_INDEX_XRES]; |
| height = s->vbe_regs[VBE_DISPI_INDEX_YRES]; |
| } else { |
| width = (s->cr[VGA_CRTC_H_DISP] + 1) * 8; |
| height = s->cr[VGA_CRTC_V_DISP_END] | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); |
| height = (height + 1); |
| } |
| *pwidth = width; |
| *pheight = height; |
| } |
| |
| void vga_invalidate_scanlines(VGACommonState *s, int y1, int y2) |
| { |
| int y; |
| if (y1 >= VGA_MAX_HEIGHT) |
| return; |
| if (y2 >= VGA_MAX_HEIGHT) |
| y2 = VGA_MAX_HEIGHT; |
| for(y = y1; y < y2; y++) { |
| s->invalidated_y_table[y >> 5] |= 1 << (y & 0x1f); |
| } |
| } |
| |
| static bool vga_scanline_invalidated(VGACommonState *s, int y) |
| { |
| if (y >= VGA_MAX_HEIGHT) { |
| return false; |
| } |
| return s->invalidated_y_table[y >> 5] & (1 << (y & 0x1f)); |
| } |
| |
| void vga_dirty_log_start(VGACommonState *s) |
| { |
| memory_region_set_log(&s->vram, true, DIRTY_MEMORY_VGA); |
| } |
| |
| void vga_dirty_log_stop(VGACommonState *s) |
| { |
| memory_region_set_log(&s->vram, false, DIRTY_MEMORY_VGA); |
| } |
| |
| /* |
| * graphic modes |
| */ |
| static void vga_draw_graphic(VGACommonState *s, int full_update) |
| { |
| DisplaySurface *surface = qemu_console_surface(s->con); |
| int y1, y, update, linesize, y_start, double_scan, mask, depth; |
| int width, height, shift_control, bwidth, bits; |
| ram_addr_t page0, page1, region_start, region_end; |
| DirtyBitmapSnapshot *snap = NULL; |
| int disp_width, multi_scan, multi_run; |
| uint8_t *d; |
| uint32_t v, addr1, addr; |
| vga_draw_line_func *vga_draw_line = NULL; |
| bool share_surface, force_shadow = false; |
| pixman_format_code_t format; |
| #ifdef HOST_WORDS_BIGENDIAN |
| bool byteswap = !s->big_endian_fb; |
| #else |
| bool byteswap = s->big_endian_fb; |
| #endif |
| |
| full_update |= update_basic_params(s); |
| |
| s->get_resolution(s, &width, &height); |
| disp_width = width; |
| depth = s->get_bpp(s); |
| |
| region_start = (s->start_addr * 4); |
| region_end = region_start + (ram_addr_t)s->line_offset * height; |
| region_end += width * depth / 8; /* scanline length */ |
| region_end -= s->line_offset; |
| if (region_end > s->vbe_size || depth == 0 || depth == 15) { |
| /* |
| * We land here on: |
| * - wraps around (can happen with cirrus vbe modes) |
| * - depth == 0 (256 color palette video mode) |
| * - depth == 15 |
| * |
| * Take the safe and slow route: |
| * - create a dirty bitmap snapshot for all vga memory. |
| * - force shadowing (so all vga memory access goes |
| * through vga_read_*() helpers). |
| * |
| * Given this affects only vga features which are pretty much |
| * unused by modern guests there should be no performance |
| * impact. |
| */ |
| region_start = 0; |
| region_end = s->vbe_size; |
| force_shadow = true; |
| } |
| |
| shift_control = (s->gr[VGA_GFX_MODE] >> 5) & 3; |
| double_scan = (s->cr[VGA_CRTC_MAX_SCAN] >> 7); |
| if (shift_control != 1) { |
| multi_scan = (((s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1) << double_scan) |
| - 1; |
| } else { |
| /* in CGA modes, multi_scan is ignored */ |
| /* XXX: is it correct ? */ |
| multi_scan = double_scan; |
| } |
| multi_run = multi_scan; |
| if (shift_control != s->shift_control || |
| double_scan != s->double_scan) { |
| full_update = 1; |
| s->shift_control = shift_control; |
| s->double_scan = double_scan; |
| } |
| |
| if (shift_control == 0) { |
| if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { |
| disp_width <<= 1; |
| } |
| } else if (shift_control == 1) { |
| if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { |
| disp_width <<= 1; |
| } |
| } |
| |
| /* |
| * Check whether we can share the surface with the backend |
| * or whether we need a shadow surface. We share native |
| * endian surfaces for 15bpp and above and byteswapped |
| * surfaces for 24bpp and above. |
| */ |
| format = qemu_default_pixman_format(depth, !byteswap); |
| if (format) { |
| share_surface = dpy_gfx_check_format(s->con, format) |
| && !s->force_shadow && !force_shadow; |
| } else { |
| share_surface = false; |
| } |
| |
| if (s->line_offset != s->last_line_offset || |
| disp_width != s->last_width || |
| height != s->last_height || |
| s->last_depth != depth || |
| s->last_byteswap != byteswap || |
| share_surface != is_buffer_shared(surface)) { |
| /* display parameters changed -> need new display surface */ |
| s->last_scr_width = disp_width; |
| s->last_scr_height = height; |
| s->last_width = disp_width; |
| s->last_height = height; |
| s->last_line_offset = s->line_offset; |
| s->last_depth = depth; |
| s->last_byteswap = byteswap; |
| full_update = 1; |
| } |
| if (surface_data(surface) != s->vram_ptr + (s->start_addr * 4) |
| && is_buffer_shared(surface)) { |
| /* base address changed (page flip) -> shared display surfaces |
| * must be updated with the new base address */ |
| full_update = 1; |
| } |
| |
| if (full_update) { |
| if (share_surface) { |
| surface = qemu_create_displaysurface_from(disp_width, |
| height, format, s->line_offset, |
| s->vram_ptr + (s->start_addr * 4)); |
| dpy_gfx_replace_surface(s->con, surface); |
| } else { |
| qemu_console_resize(s->con, disp_width, height); |
| surface = qemu_console_surface(s->con); |
| } |
| } |
| |
| if (shift_control == 0) { |
| full_update |= update_palette16(s); |
| if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { |
| v = VGA_DRAW_LINE4D2; |
| } else { |
| v = VGA_DRAW_LINE4; |
| } |
| bits = 4; |
| } else if (shift_control == 1) { |
| full_update |= update_palette16(s); |
| if (sr(s, VGA_SEQ_CLOCK_MODE) & 8) { |
| v = VGA_DRAW_LINE2D2; |
| } else { |
| v = VGA_DRAW_LINE2; |
| } |
| bits = 4; |
| } else { |
| switch(s->get_bpp(s)) { |
| default: |
| case 0: |
| full_update |= update_palette256(s); |
| v = VGA_DRAW_LINE8D2; |
| bits = 4; |
| break; |
| case 8: |
| full_update |= update_palette256(s); |
| v = VGA_DRAW_LINE8; |
| bits = 8; |
| break; |
| case 15: |
| v = s->big_endian_fb ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE; |
| bits = 16; |
| break; |
| case 16: |
| v = s->big_endian_fb ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE; |
| bits = 16; |
| break; |
| case 24: |
| v = s->big_endian_fb ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE; |
| bits = 24; |
| break; |
| case 32: |
| v = s->big_endian_fb ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE; |
| bits = 32; |
| break; |
| } |
| } |
| vga_draw_line = vga_draw_line_table[v]; |
| |
| if (!is_buffer_shared(surface) && s->cursor_invalidate) { |
| s->cursor_invalidate(s); |
| } |
| |
| #if 0 |
| printf("w=%d h=%d v=%d line_offset=%d cr[0x09]=0x%02x cr[0x17]=0x%02x linecmp=%d sr[0x01]=0x%02x\n", |
| width, height, v, line_offset, s->cr[9], s->cr[VGA_CRTC_MODE], |
| s->line_compare, sr(s, VGA_SEQ_CLOCK_MODE)); |
| #endif |
| addr1 = (s->start_addr * 4); |
| bwidth = DIV_ROUND_UP(width * bits, 8); |
| y_start = -1; |
| d = surface_data(surface); |
| linesize = surface_stride(surface); |
| y1 = 0; |
| |
| if (!full_update) { |
| if (s->line_compare < height) { |
| /* split screen mode */ |
| region_start = 0; |
| } |
| snap = memory_region_snapshot_and_clear_dirty(&s->vram, region_start, |
| region_end - region_start, |
| DIRTY_MEMORY_VGA); |
| } |
| |
| for(y = 0; y < height; y++) { |
| addr = addr1; |
| if (!(s->cr[VGA_CRTC_MODE] & 1)) { |
| int shift; |
| /* CGA compatibility handling */ |
| shift = 14 + ((s->cr[VGA_CRTC_MODE] >> 6) & 1); |
| addr = (addr & ~(1 << shift)) | ((y1 & 1) << shift); |
| } |
| if (!(s->cr[VGA_CRTC_MODE] & 2)) { |
| addr = (addr & ~0x8000) | ((y1 & 2) << 14); |
| } |
| update = full_update; |
| page0 = addr & s->vbe_size_mask; |
| page1 = (addr + bwidth - 1) & s->vbe_size_mask; |
| if (full_update) { |
| update = 1; |
| } else if (page1 < page0) { |
| /* scanline wraps from end of video memory to the start */ |
| assert(force_shadow); |
| update = memory_region_snapshot_get_dirty(&s->vram, snap, |
| page0, s->vbe_size - page0); |
| update |= memory_region_snapshot_get_dirty(&s->vram, snap, |
| 0, page1); |
| } else { |
| update = memory_region_snapshot_get_dirty(&s->vram, snap, |
| page0, page1 - page0); |
| } |
| /* explicit invalidation for the hardware cursor (cirrus only) */ |
| update |= vga_scanline_invalidated(s, y); |
| if (update) { |
| if (y_start < 0) |
| y_start = y; |
| if (!(is_buffer_shared(surface))) { |
| vga_draw_line(s, d, addr, width); |
| if (s->cursor_draw_line) |
| s->cursor_draw_line(s, d, y); |
| } |
| } else { |
| if (y_start >= 0) { |
| /* flush to display */ |
| dpy_gfx_update(s->con, 0, y_start, |
| disp_width, y - y_start); |
| y_start = -1; |
| } |
| } |
| if (!multi_run) { |
| mask = (s->cr[VGA_CRTC_MODE] & 3) ^ 3; |
| if ((y1 & mask) == mask) |
| addr1 += s->line_offset; |
| y1++; |
| multi_run = multi_scan; |
| } else { |
| multi_run--; |
| } |
| /* line compare acts on the displayed lines */ |
| if (y == s->line_compare) |
| addr1 = 0; |
| d += linesize; |
| } |
| if (y_start >= 0) { |
| /* flush to display */ |
| dpy_gfx_update(s->con, 0, y_start, |
| disp_width, y - y_start); |
| } |
| g_free(snap); |
| memset(s->invalidated_y_table, 0, sizeof(s->invalidated_y_table)); |
| } |
| |
| static void vga_draw_blank(VGACommonState *s, int full_update) |
| { |
| DisplaySurface *surface = qemu_console_surface(s->con); |
| int i, w; |
| uint8_t *d; |
| |
| if (!full_update) |
| return; |
| if (s->last_scr_width <= 0 || s->last_scr_height <= 0) |
| return; |
| |
| w = s->last_scr_width * surface_bytes_per_pixel(surface); |
| d = surface_data(surface); |
| for(i = 0; i < s->last_scr_height; i++) { |
| memset(d, 0, w); |
| d += surface_stride(surface); |
| } |
| dpy_gfx_update_full(s->con); |
| } |
| |
| #define GMODE_TEXT 0 |
| #define GMODE_GRAPH 1 |
| #define GMODE_BLANK 2 |
| |
| static void vga_update_display(void *opaque) |
| { |
| VGACommonState *s = opaque; |
| DisplaySurface *surface = qemu_console_surface(s->con); |
| int full_update, graphic_mode; |
| |
| qemu_flush_coalesced_mmio_buffer(); |
| |
| if (surface_bits_per_pixel(surface) == 0) { |
| /* nothing to do */ |
| } else { |
| full_update = 0; |
| if (!(s->ar_index & 0x20)) { |
| graphic_mode = GMODE_BLANK; |
| } else { |
| graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; |
| } |
| if (graphic_mode != s->graphic_mode) { |
| s->graphic_mode = graphic_mode; |
| s->cursor_blink_time = qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL); |
| full_update = 1; |
| } |
| switch(graphic_mode) { |
| case GMODE_TEXT: |
| vga_draw_text(s, full_update); |
| break; |
| case GMODE_GRAPH: |
| vga_draw_graphic(s, full_update); |
| break; |
| case GMODE_BLANK: |
| default: |
| vga_draw_blank(s, full_update); |
| break; |
| } |
| } |
| } |
| |
| /* force a full display refresh */ |
| static void vga_invalidate_display(void *opaque) |
| { |
| VGACommonState *s = opaque; |
| |
| s->last_width = -1; |
| s->last_height = -1; |
| } |
| |
| void vga_common_reset(VGACommonState *s) |
| { |
| s->sr_index = 0; |
| memset(s->sr, '\0', sizeof(s->sr)); |
| memset(s->sr_vbe, '\0', sizeof(s->sr_vbe)); |
| s->gr_index = 0; |
| memset(s->gr, '\0', sizeof(s->gr)); |
| s->ar_index = 0; |
| memset(s->ar, '\0', sizeof(s->ar)); |
| s->ar_flip_flop = 0; |
| s->cr_index = 0; |
| memset(s->cr, '\0', sizeof(s->cr)); |
| s->msr = 0; |
| s->fcr = 0; |
| s->st00 = 0; |
| s->st01 = 0; |
| s->dac_state = 0; |
| s->dac_sub_index = 0; |
| s->dac_read_index = 0; |
| s->dac_write_index = 0; |
| memset(s->dac_cache, '\0', sizeof(s->dac_cache)); |
| s->dac_8bit = 0; |
| memset(s->palette, '\0', sizeof(s->palette)); |
| s->bank_offset = 0; |
| s->vbe_index = 0; |
| memset(s->vbe_regs, '\0', sizeof(s->vbe_regs)); |
| s->vbe_regs[VBE_DISPI_INDEX_ID] = VBE_DISPI_ID5; |
| s->vbe_start_addr = 0; |
| s->vbe_line_offset = 0; |
| s->vbe_bank_mask = (s->vram_size >> 16) - 1; |
| memset(s->font_offsets, '\0', sizeof(s->font_offsets)); |
| s->graphic_mode = -1; /* force full update */ |
| s->shift_control = 0; |
| s->double_scan = 0; |
| s->line_offset = 0; |
| s->line_compare = 0; |
| s->start_addr = 0; |
| s->plane_updated = 0; |
| s->last_cw = 0; |
| s->last_ch = 0; |
| s->last_width = 0; |
| s->last_height = 0; |
| s->last_scr_width = 0; |
| s->last_scr_height = 0; |
| s->cursor_start = 0; |
| s->cursor_end = 0; |
| s->cursor_offset = 0; |
| s->big_endian_fb = s->default_endian_fb; |
| memset(s->invalidated_y_table, '\0', sizeof(s->invalidated_y_table)); |
| memset(s->last_palette, '\0', sizeof(s->last_palette)); |
| memset(s->last_ch_attr, '\0', sizeof(s->last_ch_attr)); |
| switch (vga_retrace_method) { |
| case VGA_RETRACE_DUMB: |
| break; |
| case VGA_RETRACE_PRECISE: |
| memset(&s->retrace_info, 0, sizeof (s->retrace_info)); |
| break; |
| } |
| vga_update_memory_access(s); |
| } |
| |
| static void vga_reset(void *opaque) |
| { |
| VGACommonState *s = opaque; |
| vga_common_reset(s); |
| } |
| |
| #define TEXTMODE_X(x) ((x) % width) |
| #define TEXTMODE_Y(x) ((x) / width) |
| #define VMEM2CHTYPE(v) ((v & 0xff0007ff) | \ |
| ((v & 0x00000800) << 10) | ((v & 0x00007000) >> 1)) |
| /* relay text rendering to the display driver |
| * instead of doing a full vga_update_display() */ |
| static void vga_update_text(void *opaque, console_ch_t *chardata) |
| { |
| VGACommonState *s = opaque; |
| int graphic_mode, i, cursor_offset, cursor_visible; |
| int cw, cheight, width, height, size, c_min, c_max; |
| uint32_t *src; |
| console_ch_t *dst, val; |
| char msg_buffer[80]; |
| int full_update = 0; |
| |
| qemu_flush_coalesced_mmio_buffer(); |
| |
| if (!(s->ar_index & 0x20)) { |
| graphic_mode = GMODE_BLANK; |
| } else { |
| graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; |
| } |
| if (graphic_mode != s->graphic_mode) { |
| s->graphic_mode = graphic_mode; |
| full_update = 1; |
| } |
| if (s->last_width == -1) { |
| s->last_width = 0; |
| full_update = 1; |
| } |
| |
| switch (graphic_mode) { |
| case GMODE_TEXT: |
| /* TODO: update palette */ |
| full_update |= update_basic_params(s); |
| |
| /* total width & height */ |
| cheight = (s->cr[VGA_CRTC_MAX_SCAN] & 0x1f) + 1; |
| cw = 8; |
| if (!(sr(s, VGA_SEQ_CLOCK_MODE) & VGA_SR01_CHAR_CLK_8DOTS)) { |
| cw = 9; |
| } |
| if (sr(s, VGA_SEQ_CLOCK_MODE) & 0x08) { |
| cw = 16; /* NOTE: no 18 pixel wide */ |
| } |
| width = (s->cr[VGA_CRTC_H_DISP] + 1); |
| if (s->cr[VGA_CRTC_V_TOTAL] == 100) { |
| /* ugly hack for CGA 160x100x16 - explain me the logic */ |
| height = 100; |
| } else { |
| height = s->cr[VGA_CRTC_V_DISP_END] | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x02) << 7) | |
| ((s->cr[VGA_CRTC_OVERFLOW] & 0x40) << 3); |
| height = (height + 1) / cheight; |
| } |
| |
| size = (height * width); |
| if (size > CH_ATTR_SIZE) { |
| if (!full_update) |
| return; |
| |
| snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Text mode", |
| width, height); |
| break; |
| } |
| |
| if (width != s->last_width || height != s->last_height || |
| cw != s->last_cw || cheight != s->last_ch) { |
| s->last_scr_width = width * cw; |
| s->last_scr_height = height * cheight; |
| qemu_console_resize(s->con, s->last_scr_width, s->last_scr_height); |
| dpy_text_resize(s->con, width, height); |
| s->last_depth = 0; |
| s->last_width = width; |
| s->last_height = height; |
| s->last_ch = cheight; |
| s->last_cw = cw; |
| full_update = 1; |
| } |
| |
| if (full_update) { |
| s->full_update_gfx = 1; |
| } |
| if (s->full_update_text) { |
| s->full_update_text = 0; |
| full_update |= 1; |
| } |
| |
| /* Update "hardware" cursor */ |
| cursor_offset = ((s->cr[VGA_CRTC_CURSOR_HI] << 8) | |
| s->cr[VGA_CRTC_CURSOR_LO]) - s->start_addr; |
| if (cursor_offset != s->cursor_offset || |
| s->cr[VGA_CRTC_CURSOR_START] != s->cursor_start || |
| s->cr[VGA_CRTC_CURSOR_END] != s->cursor_end || full_update) { |
| cursor_visible = !(s->cr[VGA_CRTC_CURSOR_START] & 0x20); |
| if (cursor_visible && cursor_offset < size && cursor_offset >= 0) |
| dpy_text_cursor(s->con, |
| TEXTMODE_X(cursor_offset), |
| TEXTMODE_Y(cursor_offset)); |
| else |
| dpy_text_cursor(s->con, -1, -1); |
| s->cursor_offset = cursor_offset; |
| s->cursor_start = s->cr[VGA_CRTC_CURSOR_START]; |
| s->cursor_end = s->cr[VGA_CRTC_CURSOR_END]; |
| } |
| |
| src = (uint32_t *) s->vram_ptr + s->start_addr; |
| dst = chardata; |
| |
| if (full_update) { |
| for (i = 0; i < size; src ++, dst ++, i ++) |
| console_write_ch(dst, VMEM2CHTYPE(le32_to_cpu(*src))); |
| |
| dpy_text_update(s->con, 0, 0, width, height); |
| } else { |
| c_max = 0; |
| |
| for (i = 0; i < size; src ++, dst ++, i ++) { |
| console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); |
| if (*dst != val) { |
| *dst = val; |
| c_max = i; |
| break; |
| } |
| } |
| c_min = i; |
| for (; i < size; src ++, dst ++, i ++) { |
| console_write_ch(&val, VMEM2CHTYPE(le32_to_cpu(*src))); |
| if (*dst != val) { |
| *dst = val; |
| c_max = i; |
| } |
| } |
| |
| if (c_min <= c_max) { |
| i = TEXTMODE_Y(c_min); |
| dpy_text_update(s->con, 0, i, width, TEXTMODE_Y(c_max) - i + 1); |
| } |
| } |
| |
| return; |
| case GMODE_GRAPH: |
| if (!full_update) |
| return; |
| |
| s->get_resolution(s, &width, &height); |
| snprintf(msg_buffer, sizeof(msg_buffer), "%i x %i Graphic mode", |
| width, height); |
| break; |
| case GMODE_BLANK: |
| default: |
| if (!full_update) |
| return; |
| |
| snprintf(msg_buffer, sizeof(msg_buffer), "VGA Blank mode"); |
| break; |
| } |
| |
| /* Display a message */ |
| s->last_width = 60; |
| s->last_height = height = 3; |
| dpy_text_cursor(s->con, -1, -1); |
| dpy_text_resize(s->con, s->last_width, height); |
| |
| for (dst = chardata, i = 0; i < s->last_width * height; i ++) |
| console_write_ch(dst ++, ' '); |
| |
| size = strlen(msg_buffer); |
| width = (s->last_width - size) / 2; |
| dst = chardata + s->last_width + width; |
| for (i = 0; i < size; i ++) |
| console_write_ch(dst ++, ATTR2CHTYPE(msg_buffer[i], QEMU_COLOR_BLUE, |
| QEMU_COLOR_BLACK, 1)); |
| |
| dpy_text_update(s->con, 0, 0, s->last_width, height); |
| } |
| |
| static uint64_t vga_mem_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| VGACommonState *s = opaque; |
| |
| return vga_mem_readb(s, addr); |
| } |
| |
| static void vga_mem_write(void *opaque, hwaddr addr, |
| uint64_t data, unsigned size) |
| { |
| VGACommonState *s = opaque; |
| |
| vga_mem_writeb(s, addr, data); |
| } |
| |
| const MemoryRegionOps vga_mem_ops = { |
| .read = vga_mem_read, |
| .write = vga_mem_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .impl = { |
| .min_access_size = 1, |
| .max_access_size = 1, |
| }, |
| }; |
| |
| static int vga_common_post_load(void *opaque, int version_id) |
| { |
| VGACommonState *s = opaque; |
| |
| /* force refresh */ |
| s->graphic_mode = -1; |
| vbe_update_vgaregs(s); |
| vga_update_memory_access(s); |
| return 0; |
| } |
| |
| static bool vga_endian_state_needed(void *opaque) |
| { |
| VGACommonState *s = opaque; |
| |
| /* |
| * Only send the endian state if it's different from the |
| * default one, thus ensuring backward compatibility for |
| * migration of the common case |
| */ |
| return s->default_endian_fb != s->big_endian_fb; |
| } |
| |
| static const VMStateDescription vmstate_vga_endian = { |
| .name = "vga.endian", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = vga_endian_state_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_BOOL(big_endian_fb, VGACommonState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| const VMStateDescription vmstate_vga_common = { |
| .name = "vga", |
| .version_id = 2, |
| .minimum_version_id = 2, |
| .post_load = vga_common_post_load, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(latch, VGACommonState), |
| VMSTATE_UINT8(sr_index, VGACommonState), |
| VMSTATE_PARTIAL_BUFFER(sr, VGACommonState, 8), |
| VMSTATE_UINT8(gr_index, VGACommonState), |
| VMSTATE_PARTIAL_BUFFER(gr, VGACommonState, 16), |
| VMSTATE_UINT8(ar_index, VGACommonState), |
| VMSTATE_BUFFER(ar, VGACommonState), |
| VMSTATE_INT32(ar_flip_flop, VGACommonState), |
| VMSTATE_UINT8(cr_index, VGACommonState), |
| VMSTATE_BUFFER(cr, VGACommonState), |
| VMSTATE_UINT8(msr, VGACommonState), |
| VMSTATE_UINT8(fcr, VGACommonState), |
| VMSTATE_UINT8(st00, VGACommonState), |
| VMSTATE_UINT8(st01, VGACommonState), |
| |
| VMSTATE_UINT8(dac_state, VGACommonState), |
| VMSTATE_UINT8(dac_sub_index, VGACommonState), |
| VMSTATE_UINT8(dac_read_index, VGACommonState), |
| VMSTATE_UINT8(dac_write_index, VGACommonState), |
| VMSTATE_BUFFER(dac_cache, VGACommonState), |
| VMSTATE_BUFFER(palette, VGACommonState), |
| |
| VMSTATE_INT32(bank_offset, VGACommonState), |
| VMSTATE_UINT8_EQUAL(is_vbe_vmstate, VGACommonState, NULL), |
| VMSTATE_UINT16(vbe_index, VGACommonState), |
| VMSTATE_UINT16_ARRAY(vbe_regs, VGACommonState, VBE_DISPI_INDEX_NB), |
| VMSTATE_UINT32(vbe_start_addr, VGACommonState), |
| VMSTATE_UINT32(vbe_line_offset, VGACommonState), |
| VMSTATE_UINT32(vbe_bank_mask, VGACommonState), |
| VMSTATE_END_OF_LIST() |
| }, |
| .subsections = (const VMStateDescription*[]) { |
| &vmstate_vga_endian, |
| NULL |
| } |
| }; |
| |
| static const GraphicHwOps vga_ops = { |
| .invalidate = vga_invalidate_display, |
| .gfx_update = vga_update_display, |
| .text_update = vga_update_text, |
| }; |
| |
| static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax) |
| { |
| if (val < vmin) { |
| return vmin; |
| } |
| if (val > vmax) { |
| return vmax; |
| } |
| return val; |
| } |
| |
| void vga_common_init(VGACommonState *s, Object *obj) |
| { |
| int i, j, v, b; |
| |
| for(i = 0;i < 256; i++) { |
| v = 0; |
| for(j = 0; j < 8; j++) { |
| v |= ((i >> j) & 1) << (j * 4); |
| } |
| expand4[i] = v; |
| |
| v = 0; |
| for(j = 0; j < 4; j++) { |
| v |= ((i >> (2 * j)) & 3) << (j * 4); |
| } |
| expand2[i] = v; |
| } |
| for(i = 0; i < 16; i++) { |
| v = 0; |
| for(j = 0; j < 4; j++) { |
| b = ((i >> j) & 1); |
| v |= b << (2 * j); |
| v |= b << (2 * j + 1); |
| } |
| expand4to8[i] = v; |
| } |
| |
| s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512); |
| s->vram_size_mb = pow2ceil(s->vram_size_mb); |
| s->vram_size = s->vram_size_mb * MiB; |
| |
| if (!s->vbe_size) { |
| s->vbe_size = s->vram_size; |
| } |
| s->vbe_size_mask = s->vbe_size - 1; |
| |
| s->is_vbe_vmstate = 1; |
| memory_region_init_ram_nomigrate(&s->vram, obj, "vga.vram", s->vram_size, |
| &error_fatal); |
| vmstate_register_ram(&s->vram, s->global_vmstate ? NULL : DEVICE(obj)); |
| xen_register_framebuffer(&s->vram); |
| s->vram_ptr = memory_region_get_ram_ptr(&s->vram); |
| s->get_bpp = vga_get_bpp; |
| s->get_offsets = vga_get_offsets; |
| s->get_resolution = vga_get_resolution; |
| s->hw_ops = &vga_ops; |
| switch (vga_retrace_method) { |
| case VGA_RETRACE_DUMB: |
| s->retrace = vga_dumb_retrace; |
| s->update_retrace_info = vga_dumb_update_retrace_info; |
| break; |
| |
| case VGA_RETRACE_PRECISE: |
| s->retrace = vga_precise_retrace; |
| s->update_retrace_info = vga_precise_update_retrace_info; |
| break; |
| } |
| |
| /* |
| * Set default fb endian based on target, could probably be turned |
| * into a device attribute set by the machine/platform to remove |
| * all target endian dependencies from this file. |
| */ |
| #ifdef TARGET_WORDS_BIGENDIAN |
| s->default_endian_fb = true; |
| #else |
| s->default_endian_fb = false; |
| #endif |
| vga_dirty_log_start(s); |
| } |
| |
| static const MemoryRegionPortio vga_portio_list[] = { |
| { 0x04, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3b4 */ |
| { 0x0a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3ba */ |
| { 0x10, 16, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3c0 */ |
| { 0x24, 2, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3d4 */ |
| { 0x2a, 1, 1, .read = vga_ioport_read, .write = vga_ioport_write }, /* 3da */ |
| PORTIO_END_OF_LIST(), |
| }; |
| |
| static const MemoryRegionPortio vbe_portio_list[] = { |
| { 0, 1, 2, .read = vbe_ioport_read_index, .write = vbe_ioport_write_index }, |
| # ifdef TARGET_I386 |
| { 1, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, |
| # endif |
| { 2, 1, 2, .read = vbe_ioport_read_data, .write = vbe_ioport_write_data }, |
| PORTIO_END_OF_LIST(), |
| }; |
| |
| /* Used by both ISA and PCI */ |
| MemoryRegion *vga_init_io(VGACommonState *s, Object *obj, |
| const MemoryRegionPortio **vga_ports, |
| const MemoryRegionPortio **vbe_ports) |
| { |
| MemoryRegion *vga_mem; |
| |
| *vga_ports = vga_portio_list; |
| *vbe_ports = vbe_portio_list; |
| |
| vga_mem = g_malloc(sizeof(*vga_mem)); |
| memory_region_init_io(vga_mem, obj, &vga_mem_ops, s, |
| "vga-lowmem", 0x20000); |
| memory_region_set_flush_coalesced(vga_mem); |
| |
| return vga_mem; |
| } |
| |
| void vga_init(VGACommonState *s, Object *obj, MemoryRegion *address_space, |
| MemoryRegion *address_space_io, bool init_vga_ports) |
| { |
| MemoryRegion *vga_io_memory; |
| const MemoryRegionPortio *vga_ports, *vbe_ports; |
| |
| qemu_register_reset(vga_reset, s); |
| |
| s->bank_offset = 0; |
| |
| s->legacy_address_space = address_space; |
| |
| vga_io_memory = vga_init_io(s, obj, &vga_ports, &vbe_ports); |
| memory_region_add_subregion_overlap(address_space, |
| 0x000a0000, |
| vga_io_memory, |
| 1); |
| memory_region_set_coalescing(vga_io_memory); |
| if (init_vga_ports) { |
| portio_list_init(&s->vga_port_list, obj, vga_ports, s, "vga"); |
| portio_list_set_flush_coalesced(&s->vga_port_list); |
| portio_list_add(&s->vga_port_list, address_space_io, 0x3b0); |
| } |
| if (vbe_ports) { |
| portio_list_init(&s->vbe_port_list, obj, vbe_ports, s, "vbe"); |
| portio_list_add(&s->vbe_port_list, address_space_io, 0x1ce); |
| } |
| } |
| |
| void vga_init_vbe(VGACommonState *s, Object *obj, MemoryRegion *system_memory) |
| { |
| /* With pc-0.12 and below we map both the PCI BAR and the fixed VBE region, |
| * so use an alias to avoid double-mapping the same region. |
| */ |
| memory_region_init_alias(&s->vram_vbe, obj, "vram.vbe", |
| &s->vram, 0, memory_region_size(&s->vram)); |
| /* XXX: use optimized standard vga accesses */ |
| memory_region_add_subregion(system_memory, |
| VBE_DISPI_LFB_PHYSICAL_ADDRESS, |
| &s->vram_vbe); |
| s->vbe_mapped = 1; |
| } |