kern/env.c \
term/i386/pc/console.c term/i386/vga_common.c \
symlist.c
-kernel_img_HEADERS += machine/biosdisk.h machine/vga.h machine/vbe.h \
- machine/pxe.h i386/pit.h machine/init.h machine/int.h
+kernel_img_HEADERS += machine/biosdisk.h machine/pxe.h i386/pit.h \
+ machine/init.h machine/int.h
kernel_img_CFLAGS = $(COMMON_CFLAGS) $(TARGET_IMG_CFLAGS)
kernel_img_ASFLAGS = $(COMMON_ASFLAGS)
kernel_img_LDFLAGS = $(COMMON_LDFLAGS) $(TARGET_IMG_LDFLAGS)$(GRUB_KERNEL_MACHINE_LINK_ADDR) $(COMMON_CFLAGS)
grub_uint8_t alignment;
} __attribute__ ((packed));
-/* Prototypes for kernel real mode thunks. */
-
+/* Prototypes for helper functions. */
/* Call VESA BIOS 0x4f00 to get VBE Controller Information, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_controller_info) (struct grub_vbe_info_block *controller_info);
-
+grub_vbe_status_t
+grub_vbe_bios_get_controller_info (struct grub_vbe_info_block *controller_info);
/* Call VESA BIOS 0x4f01 to get VBE Mode Information, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_mode_info) (grub_uint32_t mode,
- struct grub_vbe_mode_info_block *mode_info);
-
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_getset_dac_palette_width) (int set, int *width);
-
-#define grub_vbe_bios_get_dac_palette_width(width) grub_vbe_bios_getset_dac_palette_width(0, (width))
-#define grub_vbe_bios_set_dac_palette_width(width) grub_vbe_bios_getset_dac_palette_width(1, (width))
-
-/* Call VESA BIOS 0x4f02 to set video mode, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_mode) (grub_uint32_t mode,
- struct grub_vbe_crtc_info_block *crtc_info);
-
+grub_vbe_status_t
+grub_vbe_bios_get_mode_info (grub_uint32_t mode,
+ struct grub_vbe_mode_info_block *mode_info);
/* Call VESA BIOS 0x4f03 to return current VBE Mode, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_mode) (grub_uint32_t *mode);
-
+grub_vbe_status_t
+grub_vbe_bios_get_mode (grub_uint32_t *mode);
/* Call VESA BIOS 0x4f05 to set memory window, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_memory_window) (grub_uint32_t window,
- grub_uint32_t position);
-
+grub_vbe_status_t
+grub_vbe_bios_set_memory_window (grub_uint32_t window, grub_uint32_t position);
/* Call VESA BIOS 0x4f05 to return memory window, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_memory_window) (grub_uint32_t window,
- grub_uint32_t *position);
-
+grub_vbe_status_t
+grub_vbe_bios_get_memory_window (grub_uint32_t window,
+ grub_uint32_t *position);
/* Call VESA BIOS 0x4f06 to set scanline length (in bytes), return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_scanline_length) (grub_uint32_t length);
-
+grub_vbe_status_t
+grub_vbe_bios_set_scanline_length (grub_uint32_t length);
/* Call VESA BIOS 0x4f06 to return scanline length (in bytes), return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_scanline_length) (grub_uint32_t *length);
-
-/* Call VESA BIOS 0x4f07 to set display start, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_display_start) (grub_uint32_t x,
- grub_uint32_t y);
-
+grub_vbe_status_t
+grub_vbe_bios_get_scanline_length (grub_uint32_t *length);
/* Call VESA BIOS 0x4f07 to get display start, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_get_display_start) (grub_uint32_t *x,
- grub_uint32_t *y);
+grub_vbe_status_t
+grub_vbe_bios_get_display_start (grub_uint32_t *x,
+ grub_uint32_t *y);
-/* Call VESA BIOS 0x4f09 to set palette data, return status. */
-grub_vbe_status_t EXPORT_FUNC(grub_vbe_bios_set_palette_data) (grub_uint32_t color_count,
- grub_uint32_t start_index,
- struct grub_vbe_palette_data *palette_data);
+grub_vbe_status_t grub_vbe_bios_getset_dac_palette_width (int set, int *width);
-/* Prototypes for helper functions. */
+#define grub_vbe_bios_get_dac_palette_width(width) grub_vbe_bios_getset_dac_palette_width(0, (width))
+#define grub_vbe_bios_set_dac_palette_width(width) grub_vbe_bios_getset_dac_palette_width(1, (width))
grub_err_t grub_vbe_probe (struct grub_vbe_info_block *info_block);
grub_err_t grub_vbe_set_video_mode (grub_uint32_t mode,
/* The VGA (at the beginning of upper memory). */
#define GRUB_MEMORY_MACHINE_VGA_ADDR GRUB_MEMORY_MACHINE_UPPER
-/* Set the video mode to MODE and return the previous mode. */
-unsigned char EXPORT_FUNC(grub_vga_set_mode) (unsigned char mode);
-
#endif /* ! GRUB_VGA_MACHINE_HEADER */
popl %ebp
ret
-
-/*
- * unsigned char grub_vga_set_mode (unsigned char mode)
- */
-FUNCTION(grub_vga_set_mode)
- pushl %ebp
- pushl %ebx
- movl %eax, %ecx
-
- call prot_to_real
- .code16
- /* get current mode */
- xorw %bx, %bx
- movb $0x0f, %ah
- int $0x10
- movb %al, %dl
-
- /* set the new mode */
- movb %cl, %al
- xorb %ah, %ah
- int $0x10
-
- DATA32 call real_to_prot
- .code32
-
- movb %dl, %al
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_bios_status_t grub_vbe_get_controller_info (struct grub_vbe_info_block *controller_info)
- *
- * Register allocations for parameters:
- * %eax *controller_info
- */
-FUNCTION(grub_vbe_bios_get_controller_info)
- pushl %ebp
- pushl %edi
- pushl %edx
-
- movw %ax, %di /* Store *controller_info to %edx:%di. */
- xorw %ax, %ax
- shrl $4, %eax
- mov %eax, %edx /* prot_to_real destroys %eax. */
-
- call prot_to_real
- .code16
-
- pushw %es
-
- movw %dx, %es /* *controller_info is now on %es:%di. */
- movw $0x4f00, %ax
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- popw %es
-
- DATA32 call real_to_prot
- .code32
-
- movl %edx, %eax
- andl $0x0FFFF, %eax /* Return value in %eax. */
-
- pop %edx
- popl %edi
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_get_mode_info (grub_uint32_t mode,
- * struct grub_vbe_mode_info_block *mode_info)
- *
- * Register allocations for parameters:
- * %eax mode
- * %edx *mode_info
- */
-FUNCTION(grub_vbe_bios_get_mode_info)
- pushl %ebp
- pushl %edi
-
- movl %eax, %ecx /* Store mode number to %ecx. */
-
- movw %dx, %di /* Store *mode_info to %edx:%di. */
- xorw %dx, %dx
- shrl $4, %edx
-
- call prot_to_real
- .code16
-
- pushw %es
-
- movw %dx, %es /* *mode_info is now on %es:%di. */
- movw $0x4f01, %ax
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- popw %es
-
- DATA32 call real_to_prot
- .code32
-
- movl %edx, %eax
- andl $0x0FFFF, %eax /* Return value in %eax. */
-
- popl %edi
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_set_mode (grub_uint32_t mode,
- * struct grub_vbe_crtc_info_block *crtc_info)
- *
- * Register allocations for parameters:
- * %eax mode
- * %edx *crtc_info
- */
-FUNCTION(grub_vbe_bios_set_mode)
- pushl %ebp
- pushl %ebx
- pushl %edi
-
- movl %eax, %ebx /* Store mode in %ebx. */
-
- movw %dx, %di /* Store *crtc_info to %edx:%di. */
- xorw %dx, %dx
- shrl $4, %edx
-
- call prot_to_real
- .code16
-
- pushw %es
-
- movw %dx, %es /* *crtc_info is now on %es:%di. */
-
- movw $0x4f02, %ax
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- popw %es
-
- DATA32 call real_to_prot
- .code32
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edi
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_get_mode (grub_uint32_t *mode)
- *
- * Register allocations for parameters:
- * %eax *mode
- */
-FUNCTION(grub_vbe_bios_get_mode)
- pushl %ebp
- pushl %ebx
- pushl %edi
- pushl %edx
- pushl %eax /* Push *mode to stack. */
-
- call prot_to_real
- .code16
-
- movw $0x4f03, %ax
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- popl %edi /* Pops *mode from stack to %edi. */
- andl $0xFFFF, %ebx
- movl %ebx, (%edi)
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edx
- popl %edi
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_getset_dac_palette_width (int set, int *dac_mask_size)
- *
- * Register allocations for parameters:
- * %eax set
- * %edx *dac_mask_size
- */
-FUNCTION(grub_vbe_bios_getset_dac_palette_width)
- pushl %ebp
- pushl %ebx
-
- xorl %ebx, %ebx
-
- /* If we only want to fetch the value, set %bl to 1. */
- testl %eax, %eax
- jne 1f
- incb %bl
-1:
-
- /* Put desired width in %bh. */
- movl (%edx), %eax
- movb %al, %bh
-
- call prot_to_real
- .code16
-
- movw $0x4f08, %ax
- int $0x10
-
- movw %ax, %cx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- /* Move result back to *dac_mask_size. */
- xorl %eax, %eax
- movb %bh, %al
- movl %eax, (%edx)
-
- /* Return value in %eax. */
- movw %cx, %ax
-
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_set_memory_window (grub_uint32_t window,
- * grub_uint32_t position);
- *
- * Register allocations for parameters:
- * %eax window
- * %edx position
- */
-FUNCTION(grub_vbe_bios_set_memory_window)
- pushl %ebp
- pushl %ebx
-
- movl %eax, %ebx
-
- call prot_to_real
- .code16
-
- movw $0x4f05, %ax
- andw $0x00ff, %bx /* BL = window, BH = 0, Set memory window. */
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_get_memory_window (grub_uint32_t window,
- * grub_uint32_t *position);
- *
- * Register allocations for parameters:
- * %eax window
- * %edx *position
- */
-FUNCTION(grub_vbe_bios_get_memory_window)
- pushl %ebp
- pushl %ebx
- pushl %edi
- pushl %edx /* Push *position to stack. */
-
- movl %eax, %ebx /* Store window in %ebx. */
-
- call prot_to_real
- .code16
-
- movw $0x4f05, %ax
- andw $0x00ff, %bx /* BL = window. */
- orw $0x0100, %bx /* BH = 1, Get memory window. */
- int $0x10
-
- movw %ax, %bx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- popl %edi /* pops *position from stack to %edi. */
- andl $0xFFFF, %edx
- movl %edx, (%edi) /* Return position to caller. */
-
- movw %bx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edi
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_set_scanline_length (grub_uint32_t length)
- *
- * Register allocations for parameters:
- * %eax length
- */
-FUNCTION(grub_vbe_bios_set_scanline_length)
- pushl %ebp
- pushl %ebx
- pushl %edx
-
- movl %eax, %ecx /* Store length in %ecx. */
-
- call prot_to_real
- .code16
-
- movw $0x4f06, %ax
- movw $0x0002, %bx /* BL = 2, Set Scan Line in Bytes. */
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edx
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_get_scanline_length (grub_uint32_t *length)
- *
- * Register allocations for parameters:
- * %eax *length
- */
-FUNCTION(grub_vbe_bios_get_scanline_length)
- pushl %ebp
- pushl %ebx
- pushl %edi
- pushl %edx /* Push *length to stack. */
-
- call prot_to_real
- .code16
-
- movw $0x4f06, %ax
- movw $0x0001, %bx /* BL = 1, Get Scan Line Length (in bytes). */
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- popl %edi /* Pops *length from stack to %edi. */
- andl $0xFFFF, %ebx
- movl %ebx, (%edi) /* Return length to caller. */
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edi
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_set_display_start (grub_uint32_t x,
- * grub_uint32_t y)
- *
- * Register allocations for parameters:
- * %eax x
- * %edx y
- */
-FUNCTION(grub_vbe_bios_set_display_start)
- pushl %ebp
- pushl %ebx
-
- movl %eax, %ecx /* Store x in %ecx. */
-
- call prot_to_real
- .code16
-
- movw $0x4f07, %ax
- movw $0x0080, %bx /* BL = 80h, Set Display Start
- during Vertical Retrace. */
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %ebx
- popl %ebp
- ret
-
-/*
- * grub_vbe_status_t grub_vbe_bios_get_display_start (grub_uint32_t *x,
- * grub_uint32_t *y)
- *
- * Register allocations for parameters:
- * %eax *x
- * %edx *y
- */
-FUNCTION(grub_vbe_bios_get_display_start)
- pushl %ebp
- pushl %ebx
- pushl %edi
- pushl %eax /* Push *x to stack. */
- pushl %edx /* Push *y to stack. */
-
- call prot_to_real
- .code16
-
- movw $0x4f07, %ax
- movw $0x0001, %bx /* BL = 1, Get Display Start. */
- int $0x10
-
- movw %ax, %bx /* real_to_prot destroys %eax. */
-
- DATA32 call real_to_prot
- .code32
-
- popl %edi /* Pops *y from stack to %edi. */
- andl $0xFFFF, %edx
- movl %edx, (%edi) /* Return y-position to caller. */
-
- popl %edi /* Pops *x from stack to %edi. */
- andl $0xFFFF, %ecx
- movl %ecx, (%edi) /* Return x-position to caller. */
-
- movw %bx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edi
- popl %ebx
- popl %ebp
- ret
-
-/*
- * 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)
- *
- * Register allocations for parameters:
- * %eax color_count
- * %edx start_index
- * %ecx *palette_data
- */
-FUNCTION(grub_vbe_bios_set_palette_data)
- pushl %ebp
- pushl %ebx
- pushl %edi
-
- movl %eax, %ebx /* Store color_count in %ebx. */
-
- movw %cx, %di /* Store *palette_data to %ecx:%di. */
- xorw %cx, %cx
- shrl $4, %ecx
-
- call prot_to_real
- .code16
-
- pushw %es
-
- movw %cx, %es /* *palette_data is now on %es:%di. */
- movw %bx, %cx /* color_count is now on %cx. */
-
- movw $0x4f09, %ax
- xorw %bx, %bx /* BL = 0, Set Palette Data. */
- int $0x10
-
- movw %ax, %dx /* real_to_prot destroys %eax. */
-
- popw %es
-
- DATA32 call real_to_prot
- .code32
-
- movw %dx, %ax
- andl $0xFFFF, %eax /* Return value in %eax. */
-
- popl %edi
- popl %ebx
- popl %ebp
- ret
-
-
pxe_rm_entry:
.long 0
// TODO: Deprecated and broken. Needs to be converted to Video Driver!
#include <grub/machine/vga.h>
+#include <grub/machine/int.h>
#include <grub/machine/console.h>
#include <grub/cpu/io.h>
#include <grub/term.h>
#define INPUT_STATUS1_REGISTER 0x3DA
#define INPUT_STATUS1_VERTR_BIT 0x08
+static unsigned char
+grub_vga_set_mode (unsigned char mode)
+{
+ struct grub_bios_int_registers regs;
+ unsigned char ret;
+ /* get current mode */
+ regs.eax = 0x0f00;
+ regs.ebx = 0;
+ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+ grub_bios_interrupt (0x10, ®s);
+
+ ret = regs.eax & 0xff;
+ regs.eax = mode;
+ regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
+ grub_bios_interrupt (0x10, ®s);
+
+ return ret;
+}
+
static inline void
wait_vretrace (void)
{
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/video.h>
+#include <grub/machine/int.h>
static int vbe_detected = -1;
+ ((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, ®s);
+ 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, ®s);
+ 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, ®s);
+ 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, ®s);
+
+ 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, ®s);
+ *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, ®s);
+ *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, ®s);
+ 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, ®s);
+
+ *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, ®s);
+ 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, ®s);
+
+ *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, ®s);
+ 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, ®s);
+
+ *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)
{
projects / thirdparty / grub.git / commitdiff
