[SeaBIOS] [PATCH 04/15] Report stdvga modes in VBE via int10 (AX = 4F00h)
Christian Gmeiner
christian.gmeiner at gmail.com
Mon Sep 10 08:23:11 CEST 2012
Acked-by: Christian Gmeiner <christian.gmeiner at gmail.com>
---
Christian Gmeiner, MSc
2012/9/5 Kevin O'Connor <kevin at koconnor.net>:
> On Tue, Sep 04, 2012 at 08:45:34AM +0200, Christian Gmeiner wrote:
>> 2012/9/3 Kevin O'Connor <kevin at koconnor.net>:
>> > All the modes work in the sense that one can switch to them. (I've
>> > tested that.) However, I think that some modes (eg, cga) wont be
>> > represented correctly by vbe_104f01.
>> >
>>
>> Can you look at it?
>
> Sure - see below. I don't really have a way to test this though.
>
> -Kevin
>
>
> From 91f80cd11898a254c9b38ebb857a86c1a4beb9b0 Mon Sep 17 00:00:00 2001
> From: Kevin O'Connor <kevin at koconnor.net>
> Date: Tue, 4 Sep 2012 18:39:51 -0400
> Subject: [PATCH] vgabios: Add support text and cga modes to vbe_104f01().
> To: seabios at seabios.org
>
> Attempt to handle cga and text modes in the vbe get_mode_info call.
>
> Signed-off-by: Kevin O'Connor <kevin at koconnor.net>
> ---
> vgasrc/vbe.c | 108 +++++++++++++++++++++++++++++++++++------------------------
> 1 file changed, 64 insertions(+), 44 deletions(-)
>
> diff --git a/vgasrc/vbe.c b/vgasrc/vbe.c
> index f44231b..d962333 100644
> --- a/vgasrc/vbe.c
> +++ b/vgasrc/vbe.c
> @@ -82,15 +82,8 @@ vbe_104f01(struct bregs *regs)
> }
>
> memset_far(seg, info, 0, sizeof(*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 = GET_GLOBAL(VBE_framebuffer);
> - if (framebuffer)
> - mode_attr |= VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE;
> - SET_FARVAR(seg, info->mode_attributes, mode_attr);
> +
> + // 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) |
> @@ -104,6 +97,7 @@ vbe_104f01(struct bregs *regs)
> 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);
> @@ -113,18 +107,50 @@ vbe_104f01(struct bregs *regs)
> 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);
> - int planes = (depth == 4) ? 4 : 1;
> - SET_FARVAR(seg, info->planes, planes);
> SET_FARVAR(seg, info->bits_per_pixel, depth);
> - SET_FARVAR(seg, info->banks, 1);
> - SET_FARVAR(seg, info->mem_model, GET_GLOBAL(vmode_g->memmodel));
> - SET_FARVAR(seg, info->bank_size, 0);
> - u32 pages = GET_GLOBAL(VBE_total_memory) / ALIGN(height * linesize, 64*1024);
> - SET_FARVAR(seg, info->pages, (pages / planes) - 1);
> + u8 memmodel = GET_GLOBAL(vmode_g->memmodel);
> + SET_FARVAR(seg, info->mem_model, memmodel);
> SET_FARVAR(seg, info->reserved0, 1);
>
> - u8 r_size, r_pos, g_size, g_pos, b_size, b_pos, a_size, a_pos;
> + // 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;
> + }
> + 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;
> @@ -133,11 +159,13 @@ vbe_104f01(struct bregs *regs)
> 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; break;
> + 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);
> @@ -147,31 +175,23 @@ vbe_104f01(struct bregs *regs)
> SET_FARVAR(seg, info->alpha_size, a_size);
> SET_FARVAR(seg, info->alpha_pos, a_pos);
>
> - if (depth == 32)
> - SET_FARVAR(seg, info->directcolor_info,
> - VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE);
> - else
> - SET_FARVAR(seg, info->directcolor_info, 0);
> -
> - if (depth > 4)
> - SET_FARVAR(seg, info->phys_base, GET_GLOBAL(VBE_framebuffer));
> - else
> - SET_FARVAR(seg, info->phys_base, 0);
> -
> - 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->bank_pages, 0);
> - 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);
> - SET_FARVAR(seg, info->pixclock_max, 0);
> + // 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;
> }
> --
> 1.7.11.4
>
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