| // VGA bios implementation |
| // |
| // Copyright (C) 2009-2013 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2001-2008 the LGPL VGABios developers Team |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "biosvar.h" // GET_BDA |
| #include "bregs.h" // struct bregs |
| #include "config.h" // CONFIG_* |
| #include "output.h" // dprintf |
| #include "std/vbe.h" // VBE_RETURN_STATUS_FAILED |
| #include "std/vga.h" // struct video_func_static |
| #include "stdvga.h" // stdvga_set_cursor_shape |
| #include "string.h" // memset_far |
| #include "vgabios.h" // calc_page_size |
| #include "vgafb.h" // vgafb_write_char |
| #include "vgahw.h" // vgahw_set_mode |
| #include "vgautil.h" // swcursor_pre_handle10 |
| |
| |
| /**************************************************************** |
| * Helper functions |
| ****************************************************************/ |
| |
| // Return the bits per pixel in system memory for a given mode. |
| int |
| vga_bpp(struct vgamode_s *vmode_g) |
| { |
| switch (GET_GLOBAL(vmode_g->memmodel)) { |
| case MM_TEXT: |
| return 16; |
| case MM_PLANAR: |
| return 1; |
| } |
| u8 depth = GET_GLOBAL(vmode_g->depth); |
| if (depth > 8) |
| return ALIGN(depth, 8); |
| return depth; |
| } |
| |
| u16 |
| calc_page_size(u8 memmodel, u16 width, u16 height) |
| { |
| switch (memmodel) { |
| case MM_TEXT: |
| return ALIGN(width * height * 2, 2*1024); |
| case MM_CGA: |
| return 16*1024; |
| default: |
| return ALIGN(width * height / 8, 8*1024); |
| } |
| } |
| |
| // Determine cursor shape (taking into account possible cursor scaling) |
| u16 |
| get_cursor_shape(void) |
| { |
| u16 cursor_type = GET_BDA(cursor_type); |
| u8 emulate_cursor = (GET_BDA(video_ctl) & 1) == 0; |
| if (!emulate_cursor) |
| return cursor_type; |
| u8 start = (cursor_type >> 8) & 0x3f; |
| u8 end = cursor_type & 0x1f; |
| u16 cheight = GET_BDA(char_height); |
| if (cheight <= 8 || end >= 8 || start >= 0x20) |
| return cursor_type; |
| if (end != (start + 1)) |
| start = ((start + 1) * cheight / 8) - 1; |
| else |
| start = ((end + 1) * cheight / 8) - 2; |
| end = ((end + 1) * cheight / 8) - 1; |
| return (start << 8) | end; |
| } |
| |
| static void |
| set_cursor_shape(u16 cursor_type) |
| { |
| SET_BDA(cursor_type, cursor_type); |
| if (CONFIG_VGA_STDVGA_PORTS) |
| stdvga_set_cursor_shape(get_cursor_shape()); |
| } |
| |
| static void |
| set_cursor_pos(struct cursorpos cp) |
| { |
| if (cp.page > 7) |
| // Should not happen... |
| return; |
| |
| if (cp.page == GET_BDA(video_page)) { |
| // Update cursor in hardware |
| if (CONFIG_VGA_STDVGA_PORTS) |
| stdvga_set_cursor_pos((int)text_address(cp)); |
| } |
| |
| // Update BIOS cursor pos |
| SET_BDA(cursor_pos[cp.page], (cp.y << 8) | cp.x); |
| } |
| |
| struct cursorpos |
| get_cursor_pos(u8 page) |
| { |
| if (page > 7) |
| return (struct cursorpos) { 0, 0, 0 }; |
| u16 xy = GET_BDA(cursor_pos[page]); |
| return (struct cursorpos) { xy, xy>>8, page }; |
| } |
| |
| static void |
| set_active_page(u8 page) |
| { |
| if (page > 7) |
| return; |
| |
| // Get the mode |
| struct vgamode_s *vmode_g = get_current_mode(); |
| if (!vmode_g) |
| return; |
| |
| // Calculate memory address of start of page |
| struct cursorpos cp = {0, 0, page}; |
| int address = (int)text_address(cp); |
| vgahw_set_displaystart(vmode_g, address); |
| |
| // And change the BIOS page |
| SET_BDA(video_pagestart, address); |
| SET_BDA(video_page, page); |
| |
| dprintf(1, "Set active page %02x address %04x\n", page, address); |
| |
| // Display the cursor, now the page is active |
| set_cursor_pos(get_cursor_pos(page)); |
| } |
| |
| static void |
| set_scan_lines(u8 lines) |
| { |
| stdvga_set_scan_lines(lines); |
| SET_BDA(char_height, lines); |
| u16 vde = stdvga_get_vde(); |
| u8 rows = vde / lines; |
| SET_BDA(video_rows, rows - 1); |
| u16 cols = GET_BDA(video_cols); |
| SET_BDA(video_pagesize, calc_page_size(MM_TEXT, cols, rows)); |
| if (lines == 8) |
| set_cursor_shape(0x0607); |
| else |
| set_cursor_shape(((lines - 3) << 8) | (lines - 2)); |
| } |
| |
| |
| /**************************************************************** |
| * Character writing |
| ****************************************************************/ |
| |
| // Write a character to the screen and calculate new cursor position. |
| static void |
| write_char(struct cursorpos *pcp, struct carattr ca) |
| { |
| vgafb_write_char(*pcp, ca); |
| pcp->x++; |
| // Do we need to wrap ? |
| if (pcp->x == GET_BDA(video_cols)) { |
| pcp->x = 0; |
| pcp->y++; |
| } |
| } |
| |
| // Write a character to the screen at a given position. Implement |
| // special characters and scroll the screen if necessary. |
| static void |
| write_teletype(struct cursorpos *pcp, struct carattr ca) |
| { |
| switch (ca.car) { |
| case 7: |
| //FIXME should beep |
| break; |
| case 8: |
| if (pcp->x > 0) |
| pcp->x--; |
| break; |
| case '\r': |
| pcp->x = 0; |
| break; |
| case '\n': |
| pcp->y++; |
| break; |
| default: |
| write_char(pcp, ca); |
| break; |
| } |
| |
| // Do we need to scroll ? |
| u16 nbrows = GET_BDA(video_rows); |
| if (pcp->y > nbrows) { |
| pcp->y--; |
| |
| struct cursorpos win = {0, 0, pcp->page}; |
| struct cursorpos winsize = {GET_BDA(video_cols), nbrows+1}; |
| struct carattr attr = {' ', 0, 0}; |
| vgafb_scroll(win, winsize, 1, attr); |
| } |
| } |
| |
| |
| /**************************************************************** |
| * Save and restore bda state |
| ****************************************************************/ |
| |
| struct saveBDAstate { |
| u8 bda_0x49[28]; |
| u8 bda_0x84[6]; |
| u16 vbe_mode; |
| struct segoff_s font0; |
| struct segoff_s font1; |
| }; |
| |
| int |
| bda_save_restore(int cmd, u16 seg, void *data) |
| { |
| if (!(cmd & SR_BDA)) |
| return 0; |
| struct saveBDAstate *info = data; |
| if (cmd & SR_SAVE) { |
| memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49 |
| , sizeof(info->bda_0x49)); |
| memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84 |
| , sizeof(info->bda_0x84)); |
| SET_FARVAR(seg, info->vbe_mode, GET_BDA_EXT(vbe_mode)); |
| SET_FARVAR(seg, info->font0, GET_IVT(0x1f)); |
| SET_FARVAR(seg, info->font1, GET_IVT(0x43)); |
| } |
| if (cmd & SR_RESTORE) { |
| memcpy_far(SEG_BDA, (void*)0x49, seg, info->bda_0x49 |
| , sizeof(info->bda_0x49)); |
| memcpy_far(SEG_BDA, (void*)0x84, seg, info->bda_0x84 |
| , sizeof(info->bda_0x84)); |
| u16 vbe_mode = GET_FARVAR(seg, info->vbe_mode); |
| SET_BDA_EXT(vbe_mode, vbe_mode); |
| struct vgamode_s *vmode_g = vgahw_find_mode(vbe_mode & ~MF_VBEFLAGS); |
| SET_BDA_EXT(vgamode_offset, (u32)vmode_g); |
| SET_IVT(0x1f, GET_FARVAR(seg, info->font0)); |
| SET_IVT(0x43, GET_FARVAR(seg, info->font1)); |
| } |
| return sizeof(*info); |
| } |
| |
| |
| /**************************************************************** |
| * Mode setting |
| ****************************************************************/ |
| |
| struct vgamode_s * |
| get_current_mode(void) |
| { |
| return (void*)(GET_BDA_EXT(vgamode_offset)+0); |
| } |
| |
| // Setup BDA after a mode switch. |
| int |
| vga_set_mode(int mode, int flags) |
| { |
| dprintf(1, "set VGA mode %x\n", mode); |
| struct vgamode_s *vmode_g = vgahw_find_mode(mode); |
| if (!vmode_g) |
| return VBE_RETURN_STATUS_FAILED; |
| |
| int ret = vgahw_set_mode(vmode_g, flags); |
| if (ret) |
| return ret; |
| |
| // Set the BIOS mem |
| int width = GET_GLOBAL(vmode_g->width); |
| int height = GET_GLOBAL(vmode_g->height); |
| u8 memmodel = GET_GLOBAL(vmode_g->memmodel); |
| int cheight = GET_GLOBAL(vmode_g->cheight); |
| if (mode < 0x100) |
| SET_BDA(video_mode, mode); |
| else |
| SET_BDA(video_mode, 0xff); |
| SET_BDA_EXT(vbe_mode, mode | (flags & MF_VBEFLAGS)); |
| SET_BDA_EXT(vgamode_offset, (u32)vmode_g); |
| if (CONFIG_VGA_ALLOCATE_EXTRA_STACK) |
| // Disable extra stack if it appears a modern OS is in use. |
| // This works around bugs in some versions of Windows (Vista |
| // and possibly later) when the stack is in the e-segment. |
| MASK_BDA_EXT(flags, BF_EXTRA_STACK |
| , (flags & MF_LEGACY) ? BF_EXTRA_STACK : 0); |
| if (memmodel == MM_TEXT) { |
| SET_BDA(video_cols, width); |
| SET_BDA(video_rows, height-1); |
| SET_BDA(cursor_type, 0x0607); |
| } else { |
| int cwidth = GET_GLOBAL(vmode_g->cwidth); |
| SET_BDA(video_cols, width / cwidth); |
| SET_BDA(video_rows, (height / cheight) - 1); |
| SET_BDA(cursor_type, vga_emulate_text() ? 0x0607 : 0x0000); |
| } |
| SET_BDA(video_pagesize, calc_page_size(memmodel, width, height)); |
| SET_BDA(crtc_address, CONFIG_VGA_STDVGA_PORTS ? stdvga_get_crtc() : 0); |
| SET_BDA(char_height, cheight); |
| SET_BDA(video_ctl, 0x60 | (flags & MF_NOCLEARMEM ? 0x80 : 0x00)); |
| SET_BDA(video_switches, 0xF9); |
| SET_BDA(modeset_ctl, GET_BDA(modeset_ctl) & 0x7f); |
| int i; |
| for (i=0; i<8; i++) |
| SET_BDA(cursor_pos[i], 0x0000); |
| SET_BDA(video_pagestart, 0x0000); |
| SET_BDA(video_page, 0x00); |
| |
| // Set the ints 0x1F and 0x43 |
| SET_IVT(0x1f, SEGOFF(get_global_seg(), (u32)&vgafont8[128 * 8])); |
| |
| switch (cheight) { |
| case 8: |
| SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont8)); |
| break; |
| case 14: |
| SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont14)); |
| break; |
| case 16: |
| SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont16)); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| |
| /**************************************************************** |
| * VGA int 10 handler |
| ****************************************************************/ |
| |
| static void |
| handle_1000(struct bregs *regs) |
| { |
| int mode = regs->al & 0x7f; |
| int flags = MF_LEGACY | (GET_BDA(modeset_ctl) & (MF_NOPALETTE|MF_GRAYSUM)); |
| if (regs->al & 0x80) |
| flags |= MF_NOCLEARMEM; |
| |
| // Set regs->al |
| if (mode > 7) |
| regs->al = 0x20; |
| else if (mode == 6) |
| regs->al = 0x3f; |
| else |
| regs->al = 0x30; |
| |
| vga_set_mode(mode, flags); |
| } |
| |
| static void |
| handle_1001(struct bregs *regs) |
| { |
| set_cursor_shape(regs->cx); |
| } |
| |
| static void |
| handle_1002(struct bregs *regs) |
| { |
| struct cursorpos cp = {regs->dl, regs->dh, regs->bh}; |
| set_cursor_pos(cp); |
| } |
| |
| static void |
| handle_1003(struct bregs *regs) |
| { |
| regs->cx = GET_BDA(cursor_type); |
| struct cursorpos cp = get_cursor_pos(regs->bh); |
| regs->dl = cp.x; |
| regs->dh = cp.y; |
| } |
| |
| // Read light pen pos (unimplemented) |
| static void |
| handle_1004(struct bregs *regs) |
| { |
| debug_stub(regs); |
| regs->ax = regs->bx = regs->cx = regs->dx = 0; |
| } |
| |
| static void |
| handle_1005(struct bregs *regs) |
| { |
| set_active_page(regs->al); |
| } |
| |
| static void |
| verify_scroll(struct bregs *regs, int dir) |
| { |
| // Verify parameters |
| u8 ulx = regs->cl, uly = regs->ch, lrx = regs->dl, lry = regs->dh; |
| u16 nbrows = GET_BDA(video_rows) + 1; |
| if (lry >= nbrows) |
| lry = nbrows - 1; |
| u16 nbcols = GET_BDA(video_cols); |
| if (lrx >= nbcols) |
| lrx = nbcols - 1; |
| int wincols = lrx - ulx + 1, winrows = lry - uly + 1; |
| if (wincols <= 0 || winrows <= 0) |
| return; |
| int lines = regs->al; |
| if (lines >= winrows) |
| lines = 0; |
| lines *= dir; |
| |
| // Scroll (or clear) window |
| struct cursorpos win = {ulx, uly, GET_BDA(video_page)}; |
| struct cursorpos winsize = {wincols, winrows}; |
| struct carattr attr = {' ', regs->bh, 1}; |
| vgafb_scroll(win, winsize, lines, attr); |
| } |
| |
| static void |
| handle_1006(struct bregs *regs) |
| { |
| verify_scroll(regs, 1); |
| } |
| |
| static void |
| handle_1007(struct bregs *regs) |
| { |
| verify_scroll(regs, -1); |
| } |
| |
| static void |
| handle_1008(struct bregs *regs) |
| { |
| struct carattr ca = vgafb_read_char(get_cursor_pos(regs->bh)); |
| regs->al = ca.car; |
| regs->ah = ca.attr; |
| } |
| |
| static void noinline |
| handle_1009(struct bregs *regs) |
| { |
| struct carattr ca = {regs->al, regs->bl, 1}; |
| struct cursorpos cp = get_cursor_pos(regs->bh); |
| int count = regs->cx; |
| while (count--) |
| write_char(&cp, ca); |
| } |
| |
| static void noinline |
| handle_100a(struct bregs *regs) |
| { |
| struct carattr ca = {regs->al, regs->bl, 0}; |
| struct cursorpos cp = get_cursor_pos(regs->bh); |
| int count = regs->cx; |
| while (count--) |
| write_char(&cp, ca); |
| } |
| |
| |
| static void |
| handle_100b00(struct bregs *regs) |
| { |
| stdvga_set_border_color(regs->bl); |
| } |
| |
| static void |
| handle_100b01(struct bregs *regs) |
| { |
| stdvga_set_palette(regs->bl); |
| } |
| |
| static void |
| handle_100bXX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| } |
| |
| static void |
| handle_100b(struct bregs *regs) |
| { |
| if (!CONFIG_VGA_STDVGA_PORTS) { |
| handle_100bXX(regs); |
| return; |
| } |
| switch (regs->bh) { |
| case 0x00: handle_100b00(regs); break; |
| case 0x01: handle_100b01(regs); break; |
| default: handle_100bXX(regs); break; |
| } |
| } |
| |
| |
| static void |
| handle_100c(struct bregs *regs) |
| { |
| // XXX - page (regs->bh) is unused |
| vgafb_write_pixel(regs->al, regs->cx, regs->dx); |
| } |
| |
| static void |
| handle_100d(struct bregs *regs) |
| { |
| // XXX - page (regs->bh) is unused |
| regs->al = vgafb_read_pixel(regs->cx, regs->dx); |
| } |
| |
| static void noinline |
| handle_100e(struct bregs *regs) |
| { |
| // Ralf Brown Interrupt list is WRONG on bh(page) |
| // We do output only on the current page ! |
| struct carattr ca = {regs->al, regs->bl, 0}; |
| struct cursorpos cp = get_cursor_pos(GET_BDA(video_page)); |
| write_teletype(&cp, ca); |
| set_cursor_pos(cp); |
| } |
| |
| static void |
| handle_100f(struct bregs *regs) |
| { |
| regs->bh = GET_BDA(video_page); |
| regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80); |
| regs->ah = GET_BDA(video_cols); |
| } |
| |
| |
| static void |
| handle_101000(struct bregs *regs) |
| { |
| if (regs->bl > 0x14) |
| return; |
| stdvga_attr_write(regs->bl, regs->bh); |
| } |
| |
| static void |
| handle_101001(struct bregs *regs) |
| { |
| stdvga_set_overscan_border_color(regs->bh); |
| } |
| |
| static void |
| handle_101002(struct bregs *regs) |
| { |
| stdvga_set_all_palette_reg(regs->es, (u8*)(regs->dx + 0)); |
| } |
| |
| static void |
| handle_101003(struct bregs *regs) |
| { |
| stdvga_toggle_intensity(regs->bl); |
| } |
| |
| static void |
| handle_101007(struct bregs *regs) |
| { |
| if (regs->bl > 0x14) |
| return; |
| regs->bh = stdvga_attr_read(regs->bl); |
| } |
| |
| static void |
| handle_101008(struct bregs *regs) |
| { |
| regs->bh = stdvga_get_overscan_border_color(); |
| } |
| |
| static void |
| handle_101009(struct bregs *regs) |
| { |
| stdvga_get_all_palette_reg(regs->es, (u8*)(regs->dx + 0)); |
| } |
| |
| static void noinline |
| handle_101010(struct bregs *regs) |
| { |
| u8 rgb[3] = {regs->dh, regs->ch, regs->cl}; |
| stdvga_dac_write(GET_SEG(SS), rgb, regs->bx, 1); |
| } |
| |
| static void |
| handle_101012(struct bregs *regs) |
| { |
| stdvga_dac_write(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx); |
| } |
| |
| static void |
| handle_101013(struct bregs *regs) |
| { |
| stdvga_select_video_dac_color_page(regs->bl, regs->bh); |
| } |
| |
| static void noinline |
| handle_101015(struct bregs *regs) |
| { |
| u8 rgb[3]; |
| stdvga_dac_read(GET_SEG(SS), rgb, regs->bx, 1); |
| regs->dh = rgb[0]; |
| regs->ch = rgb[1]; |
| regs->cl = rgb[2]; |
| } |
| |
| static void |
| handle_101017(struct bregs *regs) |
| { |
| stdvga_dac_read(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx); |
| } |
| |
| static void |
| handle_101018(struct bregs *regs) |
| { |
| stdvga_pelmask_write(regs->bl); |
| } |
| |
| static void |
| handle_101019(struct bregs *regs) |
| { |
| regs->bl = stdvga_pelmask_read(); |
| } |
| |
| static void |
| handle_10101a(struct bregs *regs) |
| { |
| stdvga_read_video_dac_state(®s->bl, ®s->bh); |
| } |
| |
| static void |
| handle_10101b(struct bregs *regs) |
| { |
| stdvga_perform_gray_scale_summing(regs->bx, regs->cx); |
| } |
| |
| static void |
| handle_1010XX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| } |
| |
| static void |
| handle_1010(struct bregs *regs) |
| { |
| if (!CONFIG_VGA_STDVGA_PORTS) { |
| handle_1010XX(regs); |
| return; |
| } |
| switch (regs->al) { |
| case 0x00: handle_101000(regs); break; |
| case 0x01: handle_101001(regs); break; |
| case 0x02: handle_101002(regs); break; |
| case 0x03: handle_101003(regs); break; |
| case 0x07: handle_101007(regs); break; |
| case 0x08: handle_101008(regs); break; |
| case 0x09: handle_101009(regs); break; |
| case 0x10: handle_101010(regs); break; |
| case 0x12: handle_101012(regs); break; |
| case 0x13: handle_101013(regs); break; |
| case 0x15: handle_101015(regs); break; |
| case 0x17: handle_101017(regs); break; |
| case 0x18: handle_101018(regs); break; |
| case 0x19: handle_101019(regs); break; |
| case 0x1a: handle_10101a(regs); break; |
| case 0x1b: handle_10101b(regs); break; |
| default: handle_1010XX(regs); break; |
| } |
| } |
| |
| |
| static void |
| handle_101100(struct bregs *regs) |
| { |
| stdvga_load_font(regs->es, (void*)(regs->bp+0), regs->cx |
| , regs->dx, regs->bl, regs->bh); |
| } |
| |
| static void |
| handle_101101(struct bregs *regs) |
| { |
| stdvga_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14); |
| } |
| |
| static void |
| handle_101102(struct bregs *regs) |
| { |
| stdvga_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8); |
| } |
| |
| static void |
| handle_101103(struct bregs *regs) |
| { |
| stdvga_set_text_block_specifier(regs->bl); |
| } |
| |
| static void |
| handle_101104(struct bregs *regs) |
| { |
| stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16); |
| } |
| |
| static void |
| handle_101110(struct bregs *regs) |
| { |
| stdvga_load_font(regs->es, (void*)(regs->bp+0), regs->cx |
| , regs->dx, regs->bl, regs->bh); |
| set_scan_lines(regs->bh); |
| } |
| |
| static void |
| handle_101111(struct bregs *regs) |
| { |
| stdvga_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14); |
| set_scan_lines(14); |
| } |
| |
| static void |
| handle_101112(struct bregs *regs) |
| { |
| stdvga_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8); |
| set_scan_lines(8); |
| } |
| |
| static void |
| handle_101114(struct bregs *regs) |
| { |
| stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16); |
| set_scan_lines(16); |
| } |
| |
| static void |
| handle_101120(struct bregs *regs) |
| { |
| SET_IVT(0x1f, SEGOFF(regs->es, regs->bp)); |
| } |
| |
| void |
| load_gfx_font(u16 seg, u16 off, u8 height, u8 bl, u8 dl) |
| { |
| u8 rows; |
| |
| SET_IVT(0x43, SEGOFF(seg, off)); |
| switch(bl) { |
| case 0: |
| rows = dl; |
| break; |
| case 1: |
| rows = 14; |
| break; |
| case 3: |
| rows = 43; |
| break; |
| case 2: |
| default: |
| rows = 25; |
| break; |
| } |
| SET_BDA(video_rows, rows - 1); |
| SET_BDA(char_height, height); |
| } |
| |
| static void |
| handle_101121(struct bregs *regs) |
| { |
| load_gfx_font(regs->es, regs->bp, regs->cx, regs->bl, regs->dl); |
| } |
| |
| static void |
| handle_101122(struct bregs *regs) |
| { |
| load_gfx_font(get_global_seg(), (u32)vgafont14, 14, regs->bl, regs->dl); |
| } |
| |
| static void |
| handle_101123(struct bregs *regs) |
| { |
| load_gfx_font(get_global_seg(), (u32)vgafont8, 8, regs->bl, regs->dl); |
| } |
| |
| static void |
| handle_101124(struct bregs *regs) |
| { |
| load_gfx_font(get_global_seg(), (u32)vgafont16, 16, regs->bl, regs->dl); |
| } |
| |
| static void |
| handle_101130(struct bregs *regs) |
| { |
| switch (regs->bh) { |
| case 0x00: { |
| struct segoff_s so = GET_IVT(0x1f); |
| regs->es = so.seg; |
| regs->bp = so.offset; |
| break; |
| } |
| case 0x01: { |
| struct segoff_s so = GET_IVT(0x43); |
| regs->es = so.seg; |
| regs->bp = so.offset; |
| break; |
| } |
| case 0x02: |
| regs->es = get_global_seg(); |
| regs->bp = (u32)vgafont14; |
| break; |
| case 0x03: |
| regs->es = get_global_seg(); |
| regs->bp = (u32)vgafont8; |
| break; |
| case 0x04: |
| regs->es = get_global_seg(); |
| regs->bp = (u32)vgafont8 + 128 * 8; |
| break; |
| case 0x05: |
| regs->es = get_global_seg(); |
| regs->bp = (u32)vgafont14alt; |
| break; |
| case 0x06: |
| regs->es = get_global_seg(); |
| regs->bp = (u32)vgafont16; |
| break; |
| case 0x07: |
| regs->es = get_global_seg(); |
| regs->bp = (u32)vgafont16alt; |
| break; |
| default: |
| dprintf(1, "Get font info BH(%02x) was discarded\n", regs->bh); |
| return; |
| } |
| // Set byte/char of on screen font |
| regs->cx = GET_BDA(char_height) & 0xff; |
| |
| // Set Highest char row |
| regs->dl = GET_BDA(video_rows); |
| } |
| |
| static void |
| handle_1011XX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| } |
| |
| static void |
| handle_1011(struct bregs *regs) |
| { |
| if (CONFIG_VGA_STDVGA_PORTS) { |
| switch (regs->al) { |
| case 0x00: handle_101100(regs); return; |
| case 0x01: handle_101101(regs); return; |
| case 0x02: handle_101102(regs); return; |
| case 0x03: handle_101103(regs); return; |
| case 0x04: handle_101104(regs); return; |
| case 0x10: handle_101110(regs); return; |
| case 0x11: handle_101111(regs); return; |
| case 0x12: handle_101112(regs); return; |
| case 0x14: handle_101114(regs); return; |
| } |
| } |
| switch (regs->al) { |
| case 0x30: handle_101130(regs); break; |
| case 0x20: handle_101120(regs); break; |
| case 0x21: handle_101121(regs); break; |
| case 0x22: handle_101122(regs); break; |
| case 0x23: handle_101123(regs); break; |
| case 0x24: handle_101124(regs); break; |
| default: handle_1011XX(regs); break; |
| } |
| } |
| |
| |
| static void |
| handle_101210(struct bregs *regs) |
| { |
| u16 crtc_addr = GET_BDA(crtc_address); |
| if (crtc_addr == VGAREG_MDA_CRTC_ADDRESS) |
| regs->bx = 0x0103; |
| else |
| regs->bx = 0x0003; |
| regs->cx = GET_BDA(video_switches) & 0x0f; |
| } |
| |
| static void |
| handle_101230(struct bregs *regs) |
| { |
| u8 mctl = GET_BDA(modeset_ctl); |
| u8 vswt = GET_BDA(video_switches); |
| switch (regs->al) { |
| case 0x00: |
| // 200 lines |
| mctl = (mctl & ~0x10) | 0x80; |
| vswt = (vswt & ~0x0f) | 0x08; |
| break; |
| case 0x01: |
| // 350 lines |
| mctl &= ~0x90; |
| vswt = (vswt & ~0x0f) | 0x09; |
| break; |
| case 0x02: |
| // 400 lines |
| mctl = (mctl & ~0x80) | 0x10; |
| vswt = (vswt & ~0x0f) | 0x09; |
| break; |
| default: |
| dprintf(1, "Select vert res (%02x) was discarded\n", regs->al); |
| break; |
| } |
| SET_BDA(modeset_ctl, mctl); |
| SET_BDA(video_switches, vswt); |
| regs->al = 0x12; |
| } |
| |
| static void |
| handle_101231(struct bregs *regs) |
| { |
| u8 v = (regs->al & 0x01) << 3; |
| u8 mctl = GET_BDA(video_ctl) & ~0x08; |
| SET_BDA(video_ctl, mctl | v); |
| regs->al = 0x12; |
| } |
| |
| static void |
| handle_101232(struct bregs *regs) |
| { |
| if (CONFIG_VGA_STDVGA_PORTS) { |
| stdvga_enable_video_addressing(regs->al); |
| regs->al = 0x12; |
| } |
| } |
| |
| static void |
| handle_101233(struct bregs *regs) |
| { |
| u8 v = ((regs->al << 1) & 0x02) ^ 0x02; |
| u8 v2 = GET_BDA(modeset_ctl) & ~0x02; |
| SET_BDA(modeset_ctl, v | v2); |
| regs->al = 0x12; |
| } |
| |
| static void |
| handle_101234(struct bregs *regs) |
| { |
| SET_BDA(video_ctl, (GET_BDA(video_ctl) & ~0x01) | (regs->al & 0x01)); |
| regs->al = 0x12; |
| } |
| |
| static void |
| handle_101235(struct bregs *regs) |
| { |
| debug_stub(regs); |
| regs->al = 0x12; |
| } |
| |
| static void |
| handle_101236(struct bregs *regs) |
| { |
| debug_stub(regs); |
| regs->al = 0x12; |
| } |
| |
| static void |
| handle_1012XX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| } |
| |
| static void |
| handle_1012(struct bregs *regs) |
| { |
| if (CONFIG_VGA_CIRRUS && regs->bl >= 0x80) { |
| clext_1012(regs); |
| return; |
| } |
| |
| switch (regs->bl) { |
| case 0x10: handle_101210(regs); break; |
| case 0x30: handle_101230(regs); break; |
| case 0x31: handle_101231(regs); break; |
| case 0x32: handle_101232(regs); break; |
| case 0x33: handle_101233(regs); break; |
| case 0x34: handle_101234(regs); break; |
| case 0x35: handle_101235(regs); break; |
| case 0x36: handle_101236(regs); break; |
| default: handle_1012XX(regs); break; |
| } |
| } |
| |
| |
| // Write string |
| static void noinline |
| handle_1013(struct bregs *regs) |
| { |
| struct cursorpos cp = {regs->dl, regs->dh, regs->bh}; |
| u16 count = regs->cx; |
| u8 *offset_far = (void*)(regs->bp + 0); |
| u8 attr = regs->bl; |
| while (count--) { |
| u8 car = GET_FARVAR(regs->es, *offset_far); |
| offset_far++; |
| if (regs->al & 2) { |
| attr = GET_FARVAR(regs->es, *offset_far); |
| offset_far++; |
| } |
| |
| struct carattr ca = {car, attr, 1}; |
| write_teletype(&cp, ca); |
| } |
| |
| if (regs->al & 1) |
| set_cursor_pos(cp); |
| } |
| |
| |
| static void |
| handle_101a00(struct bregs *regs) |
| { |
| regs->bx = GET_BDA(dcc_index); |
| regs->al = 0x1a; |
| } |
| |
| static void |
| handle_101a01(struct bregs *regs) |
| { |
| SET_BDA(dcc_index, regs->bl); |
| dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh); |
| regs->al = 0x1a; |
| } |
| |
| static void |
| handle_101aXX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| } |
| |
| static void |
| handle_101a(struct bregs *regs) |
| { |
| switch (regs->al) { |
| case 0x00: handle_101a00(regs); break; |
| case 0x01: handle_101a01(regs); break; |
| default: handle_101aXX(regs); break; |
| } |
| } |
| |
| |
| struct video_func_static static_functionality VAR16 = { |
| .modes = 0x00, // Filled in by stdvga_build_video_param() |
| .scanlines = 0x07, // 200, 350, 400 scan lines |
| .cblocks = 0x02, // mamimum number of visible charsets in text mode |
| .active_cblocks = 0x08, // total number of charset blocks in text mode |
| .misc_flags = 0x0ce7, |
| }; |
| |
| static void |
| handle_101b(struct bregs *regs) |
| { |
| u16 seg = regs->es; |
| struct video_func_info *info = (void*)(regs->di+0); |
| memset_far(seg, info, 0, sizeof(*info)); |
| // Address of static functionality table |
| SET_FARVAR(seg, info->static_functionality |
| , SEGOFF(get_global_seg(), (u32)&static_functionality)); |
| |
| // Hard coded copy from BIOS area. Should it be cleaner ? |
| memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49 |
| , sizeof(info->bda_0x49)); |
| memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84 |
| , sizeof(info->bda_0x84)); |
| |
| SET_FARVAR(seg, info->dcc_index, GET_BDA(dcc_index)); |
| SET_FARVAR(seg, info->colors, 16); |
| SET_FARVAR(seg, info->pages, 8); |
| SET_FARVAR(seg, info->scan_lines, 2); |
| SET_FARVAR(seg, info->video_mem, 3); |
| regs->al = 0x1B; |
| } |
| |
| |
| static void |
| handle_101c(struct bregs *regs) |
| { |
| u16 seg = regs->es; |
| void *data = (void*)(regs->bx+0); |
| u16 states = regs->cx; |
| u8 cmd = regs->al; |
| if (states & ~0x07 || cmd > 2) |
| goto fail; |
| int ret = vgahw_save_restore(states | (cmd<<8), seg, data); |
| if (ret < 0) |
| goto fail; |
| if (cmd == 0) |
| regs->bx = ret / 64; |
| regs->al = 0x1c; |
| fail: |
| return; |
| } |
| |
| static void |
| handle_10XX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| } |
| |
| // INT 10h Video Support Service Entry Point |
| void VISIBLE16 |
| handle_10(struct bregs *regs) |
| { |
| debug_enter(regs, DEBUG_VGA_10); |
| swcursor_pre_handle10(regs); |
| |
| switch (regs->ah) { |
| case 0x00: handle_1000(regs); break; |
| case 0x01: handle_1001(regs); break; |
| case 0x02: handle_1002(regs); break; |
| case 0x03: handle_1003(regs); break; |
| case 0x04: handle_1004(regs); break; |
| case 0x05: handle_1005(regs); break; |
| case 0x06: handle_1006(regs); break; |
| case 0x07: handle_1007(regs); break; |
| case 0x08: handle_1008(regs); break; |
| case 0x09: handle_1009(regs); break; |
| case 0x0a: handle_100a(regs); break; |
| case 0x0b: handle_100b(regs); break; |
| case 0x0c: handle_100c(regs); break; |
| case 0x0d: handle_100d(regs); break; |
| case 0x0e: handle_100e(regs); break; |
| case 0x0f: handle_100f(regs); break; |
| case 0x10: handle_1010(regs); break; |
| case 0x11: handle_1011(regs); break; |
| case 0x12: handle_1012(regs); break; |
| case 0x13: handle_1013(regs); break; |
| case 0x1a: handle_101a(regs); break; |
| case 0x1b: handle_101b(regs); break; |
| case 0x1c: handle_101c(regs); break; |
| case 0x4f: handle_104f(regs); break; |
| default: handle_10XX(regs); break; |
| } |
| } |
