diff options
| author | Patrick Rudolph <siro@das-labor.org> | 2019-10-25 08:09:33 +0200 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2019-10-29 19:41:19 +0000 |
| commit | 776da0872efcc58543afbe32fc55202521ef0014 (patch) | |
| tree | 8c7d4a952693a77634267779293a2458e51fdd84 /src/device/oprom/realmode | |
| parent | 5f2576089fca9b5b7c00d1dde1223d80fe9c9e2f (diff) | |
arch/x86/*.S: use defines instead of hardcoded values
As preparation for x86_64 clean the assembly code and introduce
arch/ram_segs.h similar to existing arch/rom_segs.h.
Replace open coded segment values with the defines from the new
header.
Change-Id: Ib006cd4df59951335506b8153e9347450ec3403e
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36321
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/device/oprom/realmode')
| -rw-r--r-- | src/device/oprom/realmode/x86_asm.S | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/src/device/oprom/realmode/x86_asm.S b/src/device/oprom/realmode/x86_asm.S index 8c9e12b143..d68fdc5fca 100644 --- a/src/device/oprom/realmode/x86_asm.S +++ b/src/device/oprom/realmode/x86_asm.S @@ -14,6 +14,8 @@ #define REALMODE_BASE 0x600 #define RELOCATED(x) (x - __realmode_code + REALMODE_BASE) +#include <arch/ram_segs.h> + /* CR0 bits */ #define PE (1 << 0) @@ -106,7 +108,7 @@ __realmode_call: movl %eax, __registers + 20 /* edi */ /* Activate the right segment descriptor real mode. */ - ljmp $0x28, $RELOCATED(1f) + ljmp $RAM_CODE16_SEG, $RELOCATED(1f) 1: .code16 /* 16 bit code from here on... */ @@ -116,7 +118,7 @@ __realmode_call: * configurations (limits, writability, etc.) once * protected mode is turned off. */ - mov $0x30, %ax + mov $RAM_DATA16_SEG, %ax mov %ax, %ds mov %ax, %es mov %ax, %fs @@ -186,10 +188,10 @@ __lcall_instr = RELOCATED(.) /* Now that we are in protected mode * jump to a 32 bit code segment. */ - ljmpl $0x10, $RELOCATED(1f) + ljmpl $RAM_CODE_SEG, $RELOCATED(1f) 1: .code32 - mov $0x18, %ax + mov $RAM_DATA_SEG, %ax mov %ax, %ds mov %ax, %es mov %ax, %fs @@ -242,7 +244,7 @@ __realmode_interrupt: movl %eax, __registers + 20 /* edi */ /* This configures CS properly for real mode. */ - ljmp $0x28, $RELOCATED(1f) + ljmp $RAM_CODE16_SEG, $RELOCATED(1f) 1: .code16 /* 16 bit code from here on... */ @@ -250,7 +252,7 @@ __realmode_interrupt: * descriptors. They will retain these configurations (limits, * writability, etc.) once protected mode is turned off. */ - mov $0x30, %ax + mov $RAM_DATA16_SEG, %ax mov %ax, %ds mov %ax, %es mov %ax, %fs @@ -314,10 +316,10 @@ __intXX_instr = RELOCATED(.) movl %eax, %cr0 /* Now that we are in protected mode jump to a 32-bit code segment. */ - ljmpl $0x10, $RELOCATED(1f) + ljmpl $RAM_CODE_SEG, $RELOCATED(1f) 1: .code32 - mov $0x18, %ax + mov $RAM_DATA_SEG, %ax mov %ax, %ds mov %ax, %es mov %ax, %fs @@ -363,10 +365,10 @@ __interrupt_handler_16bit = RELOCATED(.) movl %eax, %cr0 /* ... and jump to a 32 bit code segment. */ - ljmpl $0x10, $RELOCATED(1f) + ljmpl $RAM_CODE_SEG, $RELOCATED(1f) 1: .code32 - mov $0x18, %ax + mov $RAM_DATA_SEG, %ax mov %ax, %ds mov %ax, %es mov %ax, %fs @@ -380,14 +382,14 @@ __interrupt_handler_16bit = RELOCATED(.) call *%eax /* Now return to real mode ... */ - ljmp $0x28, $RELOCATED(1f) + ljmp $RAM_CODE16_SEG, $RELOCATED(1f) 1: .code16 /* Load the segment registers with properly configured segment * descriptors. They will retain these configurations (limits, * writability, etc.) once protected mode is turned off. */ - mov $0x30, %ax + mov $RAM_DATA16_SEG, %ax mov %ax, %ds mov %ax, %es mov %ax, %fs |