| // Video Bios Extensions handlers |
| // |
| // Copyright (C) 2012 Kevin O'Connor <kevin@koconnor.net> |
| // Copyright (C) 2011 Julian Pidancet <julian.pidancet@citrix.com> |
| // 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_GLOBAL |
| #include "bregs.h" // struct bregs |
| #include "config.h" // CONFIG_* |
| #include "output.h" // dprintf |
| #include "std/vbe.h" // struct vbe_info |
| #include "string.h" // memset_far |
| #include "vgabios.h" // handle_104f |
| #include "vgahw.h" // vgahw_set_mode |
| |
| u32 VBE_total_memory VAR16 = 256 * 1024; |
| u32 VBE_capabilities VAR16; |
| u32 VBE_framebuffer VAR16; |
| u16 VBE_win_granularity VAR16; |
| |
| static void |
| vbe_104f00(struct bregs *regs) |
| { |
| u16 seg = regs->es; |
| struct vbe_info *info = (void*)(regs->di+0); |
| |
| if (GET_FARVAR(seg, info->signature) == VBE2_SIGNATURE) { |
| dprintf(4, "Get VBE Controller: VBE2 Signature found\n"); |
| } else if (GET_FARVAR(seg, info->signature) == VESA_SIGNATURE) { |
| dprintf(4, "Get VBE Controller: VESA Signature found\n"); |
| } else { |
| dprintf(4, "Get VBE Controller: Invalid Signature\n"); |
| } |
| |
| memset_far(seg, info, 0, sizeof(*info)); |
| |
| SET_FARVAR(seg, info->signature, VESA_SIGNATURE); |
| |
| SET_FARVAR(seg, info->version, 0x0300); |
| |
| SET_FARVAR(seg, info->oem_string, |
| SEGOFF(get_global_seg(), (u32)VBE_OEM_STRING)); |
| SET_FARVAR(seg, info->capabilities, GET_GLOBAL(VBE_capabilities)); |
| |
| /* We generate our mode list in the reserved field of the info block */ |
| u16 *destmode = (void*)info->reserved; |
| SET_FARVAR(seg, info->video_mode, SEGOFF(seg, (u32)destmode)); |
| |
| /* Total memory (in 64k blocks) */ |
| SET_FARVAR(seg, info->total_memory |
| , GET_GLOBAL(VBE_total_memory) / (64*1024)); |
| |
| SET_FARVAR(seg, info->oem_vendor_string, |
| SEGOFF(get_global_seg(), (u32)VBE_VENDOR_STRING)); |
| SET_FARVAR(seg, info->oem_product_string, |
| SEGOFF(get_global_seg(), (u32)VBE_PRODUCT_STRING)); |
| SET_FARVAR(seg, info->oem_revision_string, |
| SEGOFF(get_global_seg(), (u32)VBE_REVISION_STRING)); |
| |
| /* Fill list of modes */ |
| u16 *last = (void*)&info->reserved[sizeof(info->reserved)]; |
| vgahw_list_modes(seg, destmode, last - 1); |
| |
| regs->ax = 0x004f; |
| } |
| |
| static void |
| vbe_104f01(struct bregs *regs) |
| { |
| u16 seg = regs->es; |
| struct vbe_mode_info *info = (void*)(regs->di+0); |
| u16 mode = regs->cx; |
| |
| dprintf(1, "VBE mode info request: %x\n", mode); |
| |
| struct vgamode_s *vmode_g = vgahw_find_mode(mode & ~MF_VBEFLAGS); |
| if (! vmode_g) { |
| dprintf(1, "VBE mode %x not found\n", mode); |
| regs->ax = 0x014f; |
| return; |
| } |
| |
| memset_far(seg, info, 0, sizeof(*info)); |
| |
| // Basic information about video controller. |
| u32 win_granularity = GET_GLOBAL(VBE_win_granularity); |
| SET_FARVAR(seg, info->winA_attributes, |
| (win_granularity ? VBE_WINDOW_ATTRIBUTE_RELOCATABLE : 0) | |
| VBE_WINDOW_ATTRIBUTE_READABLE | |
| VBE_WINDOW_ATTRIBUTE_WRITEABLE); |
| SET_FARVAR(seg, info->winB_attributes, 0); |
| SET_FARVAR(seg, info->win_granularity, win_granularity); |
| SET_FARVAR(seg, info->win_size, 64); /* Bank size 64K */ |
| SET_FARVAR(seg, info->winA_seg, GET_GLOBAL(vmode_g->sstart)); |
| SET_FARVAR(seg, info->winB_seg, 0x0); |
| extern void entry_104f05(void); |
| SET_FARVAR(seg, info->win_func_ptr |
| , SEGOFF(get_global_seg(), (u32)entry_104f05)); |
| // Basic information about mode. |
| int width = GET_GLOBAL(vmode_g->width); |
| int height = GET_GLOBAL(vmode_g->height); |
| int linesize = DIV_ROUND_UP(width * vga_bpp(vmode_g), 8); |
| SET_FARVAR(seg, info->bytes_per_scanline, linesize); |
| SET_FARVAR(seg, info->xres, width); |
| SET_FARVAR(seg, info->yres, height); |
| SET_FARVAR(seg, info->xcharsize, GET_GLOBAL(vmode_g->cwidth)); |
| SET_FARVAR(seg, info->ycharsize, GET_GLOBAL(vmode_g->cheight)); |
| int depth = GET_GLOBAL(vmode_g->depth); |
| SET_FARVAR(seg, info->bits_per_pixel, depth); |
| u8 memmodel = GET_GLOBAL(vmode_g->memmodel); |
| SET_FARVAR(seg, info->mem_model, memmodel); |
| SET_FARVAR(seg, info->reserved0, 1); |
| |
| // Mode specific info. |
| u16 mode_attr = VBE_MODE_ATTRIBUTE_SUPPORTED | |
| VBE_MODE_ATTRIBUTE_EXTENDED_INFORMATION_AVAILABLE | |
| VBE_MODE_ATTRIBUTE_COLOR_MODE | |
| VBE_MODE_ATTRIBUTE_GRAPHICS_MODE | |
| VBE_MODE_ATTRIBUTE_NOT_VGA_COMPATIBLE; |
| u32 framebuffer = 0; |
| int planes = 1, banks = 1; |
| u32 pages = GET_GLOBAL(VBE_total_memory) / ALIGN(height * linesize, 64*1024); |
| switch (memmodel) { |
| case MM_TEXT: |
| mode_attr &= ~VBE_MODE_ATTRIBUTE_GRAPHICS_MODE; |
| mode_attr |= VBE_MODE_ATTRIBUTE_TTY_BIOS_SUPPORT; |
| if (GET_GLOBAL(vmode_g->sstart) == SEG_MTEXT) |
| mode_attr &= ~VBE_MODE_ATTRIBUTE_COLOR_MODE; |
| pages = 1; |
| break; |
| case MM_CGA: |
| pages = 1; |
| banks = 2; |
| SET_FARVAR(seg, info->bank_size, 8); |
| break; |
| case MM_PLANAR: |
| planes = 4; |
| pages /= 4; |
| break; |
| default: |
| framebuffer = GET_GLOBAL(VBE_framebuffer); |
| if (framebuffer) |
| mode_attr |= VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE; |
| break; |
| } |
| if (pages > 128) |
| pages = 128; |
| if (pages < 2) |
| pages++; |
| SET_FARVAR(seg, info->mode_attributes, mode_attr); |
| SET_FARVAR(seg, info->planes, planes); |
| SET_FARVAR(seg, info->pages, pages - 1); |
| SET_FARVAR(seg, info->banks, banks); |
| |
| // Pixel color breakdown |
| u8 r_size, r_pos, g_size, g_pos, b_size, b_pos, a_size, a_pos; |
| switch (depth) { |
| case 15: r_size = 5; r_pos = 10; g_size = 5; g_pos = 5; |
| b_size = 5; b_pos = 0; a_size = 1; a_pos = 15; break; |
| case 16: r_size = 5; r_pos = 11; g_size = 6; g_pos = 5; |
| b_size = 5; b_pos = 0; a_size = 0; a_pos = 0; break; |
| case 24: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8; |
| b_size = 8; b_pos = 0; a_size = 0; a_pos = 0; break; |
| case 32: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8; |
| b_size = 8; b_pos = 0; a_size = 8; a_pos = 24; |
| SET_FARVAR(seg, info->directcolor_info, |
| VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE); |
| break; |
| default: r_size = 0; r_pos = 0; g_size = 0; g_pos = 0; |
| b_size = 0; b_pos = 0; a_size = 0; a_pos = 0; break; |
| } |
| SET_FARVAR(seg, info->red_size, r_size); |
| SET_FARVAR(seg, info->red_pos, r_pos); |
| SET_FARVAR(seg, info->green_size, g_size); |
| SET_FARVAR(seg, info->green_pos, g_pos); |
| SET_FARVAR(seg, info->blue_size, b_size); |
| SET_FARVAR(seg, info->blue_pos, b_pos); |
| SET_FARVAR(seg, info->alpha_size, a_size); |
| SET_FARVAR(seg, info->alpha_pos, a_pos); |
| |
| // Linear framebuffer info. |
| if (framebuffer) { |
| SET_FARVAR(seg, info->phys_base, framebuffer); |
| |
| SET_FARVAR(seg, info->reserved1, 0); |
| SET_FARVAR(seg, info->reserved2, 0); |
| SET_FARVAR(seg, info->linear_bytes_per_scanline, linesize); |
| SET_FARVAR(seg, info->linear_pages, 0); |
| SET_FARVAR(seg, info->linear_red_size, r_size); |
| SET_FARVAR(seg, info->linear_red_pos, r_pos); |
| SET_FARVAR(seg, info->linear_green_size, g_size); |
| SET_FARVAR(seg, info->linear_green_pos, g_pos); |
| SET_FARVAR(seg, info->linear_blue_size, b_size); |
| SET_FARVAR(seg, info->linear_blue_pos, b_pos); |
| SET_FARVAR(seg, info->linear_alpha_size, a_size); |
| SET_FARVAR(seg, info->linear_alpha_pos, a_pos); |
| } |
| |
| regs->ax = 0x004f; |
| } |
| |
| static void |
| vbe_104f02(struct bregs *regs) |
| { |
| dprintf(1, "VBE mode set: %x\n", regs->bx); |
| |
| int mode = regs->bx & ~MF_VBEFLAGS; |
| int flags = regs->bx & MF_VBEFLAGS; |
| int ret = vga_set_mode(mode, flags); |
| |
| regs->ah = ret; |
| regs->al = 0x4f; |
| } |
| |
| static void |
| vbe_104f03(struct bregs *regs) |
| { |
| regs->bx = GET_BDA(vbe_mode); |
| dprintf(1, "VBE current mode=%x\n", regs->bx); |
| regs->ax = 0x004f; |
| } |
| |
| static void |
| vbe_104f04(struct bregs *regs) |
| { |
| u16 seg = regs->es; |
| void *data = (void*)(regs->bx+0); |
| u16 states = regs->cx; |
| u8 cmd = regs->dl; |
| if (states & ~0x0f || 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->ax = 0x004f; |
| return; |
| fail: |
| regs->ax = 0x014f; |
| } |
| |
| void VISIBLE16 |
| vbe_104f05(struct bregs *regs) |
| { |
| if (regs->bh > 1 || regs->bl > 1) |
| goto fail; |
| if (GET_BDA(vbe_mode) & MF_LINEARFB) { |
| regs->ah = VBE_RETURN_STATUS_INVALID; |
| return; |
| } |
| struct vgamode_s *vmode_g = get_current_mode(); |
| if (! vmode_g) |
| goto fail; |
| if (regs->bh) { |
| int ret = vgahw_get_window(vmode_g, regs->bl); |
| if (ret < 0) |
| goto fail; |
| regs->dx = ret; |
| regs->ax = 0x004f; |
| return; |
| } |
| int ret = vgahw_set_window(vmode_g, regs->bl, regs->dx); |
| if (ret) |
| goto fail; |
| regs->ax = 0x004f; |
| return; |
| fail: |
| regs->ax = 0x014f; |
| } |
| |
| static void |
| vbe_104f06(struct bregs *regs) |
| { |
| if (regs->bl > 0x02) |
| goto fail; |
| struct vgamode_s *vmode_g = get_current_mode(); |
| if (! vmode_g) |
| goto fail; |
| int bpp = vga_bpp(vmode_g); |
| |
| if (regs->bl == 0x00) { |
| int ret = vgahw_set_linelength(vmode_g, DIV_ROUND_UP(regs->cx * bpp, 8)); |
| if (ret) |
| goto fail; |
| } else if (regs->bl == 0x02) { |
| int ret = vgahw_set_linelength(vmode_g, regs->cx); |
| if (ret) |
| goto fail; |
| } |
| int linelength = vgahw_get_linelength(vmode_g); |
| if (linelength < 0) |
| goto fail; |
| |
| regs->bx = linelength; |
| regs->cx = (linelength * 8) / bpp; |
| regs->dx = GET_GLOBAL(VBE_total_memory) / linelength; |
| regs->ax = 0x004f; |
| return; |
| fail: |
| regs->ax = 0x014f; |
| } |
| |
| static void |
| vbe_104f07(struct bregs *regs) |
| { |
| struct vgamode_s *vmode_g = get_current_mode(); |
| if (! vmode_g) |
| goto fail; |
| int bpp = vga_bpp(vmode_g); |
| int linelength = vgahw_get_linelength(vmode_g); |
| if (linelength < 0) |
| goto fail; |
| |
| int ret; |
| switch (regs->bl) { |
| case 0x80: |
| case 0x00: |
| ret = vgahw_set_displaystart( |
| vmode_g, DIV_ROUND_UP(regs->cx * bpp, 8) + linelength * regs->dx); |
| if (ret) |
| goto fail; |
| break; |
| case 0x01: |
| ret = vgahw_get_displaystart(vmode_g); |
| if (ret < 0) |
| goto fail; |
| regs->dx = ret / linelength; |
| regs->cx = (ret % linelength) * 8 / bpp; |
| break; |
| default: |
| goto fail; |
| } |
| regs->ax = 0x004f; |
| return; |
| fail: |
| regs->ax = 0x014f; |
| } |
| |
| static void |
| vbe_104f08(struct bregs *regs) |
| { |
| struct vgamode_s *vmode_g = get_current_mode(); |
| if (! vmode_g) |
| goto fail; |
| u8 memmodel = GET_GLOBAL(vmode_g->memmodel); |
| if (memmodel == MM_DIRECT || memmodel == MM_YUV) { |
| regs->ax = 0x034f; |
| return; |
| } |
| if (regs->bl > 1) |
| goto fail; |
| if (regs->bl == 0) { |
| int ret = vgahw_set_dacformat(vmode_g, regs->bh); |
| if (ret < 0) |
| goto fail; |
| } |
| int ret = vgahw_get_dacformat(vmode_g); |
| if (ret < 0) |
| goto fail; |
| regs->bh = ret; |
| regs->ax = 0x004f; |
| return; |
| fail: |
| regs->ax = 0x014f; |
| } |
| |
| static void |
| vbe_104f0a(struct bregs *regs) |
| { |
| debug_stub(regs); |
| regs->ax = 0x0100; |
| } |
| |
| static void |
| vbe_104f10(struct bregs *regs) |
| { |
| switch (regs->bl) { |
| case 0x00: |
| regs->bx = 0x0f30; |
| break; |
| case 0x01: |
| SET_BDA(vbe_flag, regs->bh); |
| break; |
| case 0x02: |
| regs->bh = GET_BDA(vbe_flag); |
| break; |
| default: |
| regs->ax = 0x014f; |
| return; |
| } |
| regs->ax = 0x004f; |
| } |
| |
| static void |
| vbe_104fXX(struct bregs *regs) |
| { |
| debug_stub(regs); |
| regs->ax = 0x0100; |
| } |
| |
| void noinline |
| handle_104f(struct bregs *regs) |
| { |
| if (!CONFIG_VGA_VBE) { |
| vbe_104fXX(regs); |
| return; |
| } |
| |
| switch (regs->al) { |
| case 0x00: vbe_104f00(regs); break; |
| case 0x01: vbe_104f01(regs); break; |
| case 0x02: vbe_104f02(regs); break; |
| case 0x03: vbe_104f03(regs); break; |
| case 0x04: vbe_104f04(regs); break; |
| case 0x05: vbe_104f05(regs); break; |
| case 0x06: vbe_104f06(regs); break; |
| case 0x07: vbe_104f07(regs); break; |
| case 0x08: vbe_104f08(regs); break; |
| case 0x0a: vbe_104f0a(regs); break; |
| case 0x10: vbe_104f10(regs); break; |
| default: vbe_104fXX(regs); break; |
| } |
| } |
