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intwrap vbe and vga calls

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Vladimir 'phcoder' Serbinenko committed 2010-04-04 14:24:50 +02:00
1 parent 56912f57b6
commit 65936631e4
6 files changed
+244 -555
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video/i386/pc/vbe.c
+195
View File
@@ -28,6 +28,7 @@
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/video.h>
#include <grub/machine/int.h>
static int vbe_detected = -1;
@@ -71,6 +72,200 @@ real2pm (grub_vbe_farptr_t ptr)
+ ((unsigned long) ptr & 0x0000FFFF));
}
/* Call VESA BIOS 0x4f09 to set palette data, return status. */
static grub_vbe_status_t
grub_vbe_bios_set_palette_data (grub_uint32_t color_count,
grub_uint32_t start_index,
struct grub_vbe_palette_data *palette_data)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f09;
regs.ebx = 0;
regs.ecx = color_count;
regs.edx = start_index;
regs.es = (((grub_addr_t) palette_data) & 0xffff0000) >> 4;
regs.edi = ((grub_addr_t) palette_data) & 0xffff;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f00 to get VBE Controller Information, return status. */
grub_vbe_status_t
grub_vbe_bios_get_controller_info (struct grub_vbe_info_block *ci)
{
struct grub_bios_int_registers regs;
/* Store *controller_info to %es:%di. */
regs.es = (((grub_addr_t) ci) & 0xffff0000) >> 4;
regs.edi = ((grub_addr_t) ci) & 0xffff;
regs.eax = 0x4f00;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f01 to get VBE Mode Information, return status. */
grub_vbe_status_t
grub_vbe_bios_get_mode_info (grub_uint32_t mode,
struct grub_vbe_mode_info_block *mode_info)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f01;
regs.ecx = mode;
/* Store *mode_info to %es:%di. */
regs.es = ((grub_addr_t) mode_info & 0xffff0000) >> 4;
regs.edi = (grub_addr_t) mode_info & 0x0000ffff;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f02 to set video mode, return status. */
static grub_vbe_status_t
grub_vbe_bios_set_mode (grub_uint32_t mode,
struct grub_vbe_crtc_info_block *crtc_info)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f02;
regs.ebx = mode;
/* Store *crtc_info to %es:%di. */
regs.es = (((grub_addr_t) crtc_info) & 0xffff0000) >> 4;
regs.edi = ((grub_addr_t) crtc_info) & 0xffff;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f03 to return current VBE Mode, return status. */
grub_vbe_status_t
grub_vbe_bios_get_mode (grub_uint32_t *mode)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f03;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
*mode = regs.ebx & 0xffff;
return regs.eax & 0xffff;
}
grub_vbe_status_t
grub_vbe_bios_getset_dac_palette_width (int set, int *dac_mask_size)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f08;
regs.ebx = (*dac_mask_size & 0xff) >> 8;
regs.ebx = set ? 1 : 0;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
*dac_mask_size = (regs.ebx >> 8) & 0xff;
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f05 to set memory window, return status. */
grub_vbe_status_t
grub_vbe_bios_set_memory_window (grub_uint32_t window,
grub_uint32_t position)
{
struct grub_bios_int_registers regs;
/* BL = window, BH = 0, Set memory window. */
regs.ebx = window & 0x00ff;
regs.edx = position;
regs.eax = 0x4f05;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f05 to return memory window, return status. */
grub_vbe_status_t
grub_vbe_bios_get_memory_window (grub_uint32_t window,
grub_uint32_t *position)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f05;
/* BH = 1, Get memory window. BL = window. */
regs.ebx = (window & 0x00ff) | 0x100;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
*position = regs.edx & 0xffff;
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f06 to set scanline length (in bytes), return status. */
grub_vbe_status_t
grub_vbe_bios_set_scanline_length (grub_uint32_t length)
{
struct grub_bios_int_registers regs;
regs.ecx = length;
regs.eax = 0x4f06;
/* BL = 2, Set Scan Line in Bytes. */
regs.ebx = 0x0002;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f06 to return scanline length (in bytes), return status. */
grub_vbe_status_t
grub_vbe_bios_get_scanline_length (grub_uint32_t *length)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f06;
regs.ebx = 0x0001;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
/* BL = 1, Get Scan Line Length (in bytes). */
grub_bios_interrupt (0x10, &regs);
*length = regs.ebx & 0xffff;
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f07 to set display start, return status. */
static grub_vbe_status_t
grub_vbe_bios_set_display_start (grub_uint32_t x, grub_uint32_t y)
{
struct grub_bios_int_registers regs;
/* Store x in %ecx. */
regs.ecx = x;
regs.edx = y;
regs.eax = 0x4f07;
/* BL = 80h, Set Display Start during Vertical Retrace. */
regs.ebx = 0x0080;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f07 to get display start, return status. */
grub_vbe_status_t
grub_vbe_bios_get_display_start (grub_uint32_t *x,
grub_uint32_t *y)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f07;
/* BL = 1, Get Display Start. */
regs.ebx = 0x0001;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
*x = regs.ecx & 0xffff;
*y = regs.edx & 0xffff;
return regs.eax & 0xffff;
}
grub_err_t
grub_vbe_probe (struct grub_vbe_info_block *info_block)
{