sravan/system76-edk2
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Added a library for the default exception handler and started to add a dissasembler. Cleaned up some issues with BlockIo in BeagleBoard and add some extra info on Ebl devices command to show if a blk device has a file system on it.

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9830 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
2010-01-27 02:47:47 +00:00
parent 3b66da9498
commit 6f72e28d04
22 changed files with 1328 additions and 217 deletions
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36
ArmPkg/Drivers/CpuDxe/ExceptionSupport.ARMv6.asm
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@@ -101,6 +101,7 @@ ResetEntry
bx R1
UndefinedInstructionEntry
sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
srsfd #0x13! ; Store return state on SVC stack
cps #0x13 ; Switch to SVC for common stack
stmfd SP!,{LR} ; Store the link register for the current mode
@@ -112,6 +113,7 @@ UndefinedInstructionEntry
bx R1
SoftwareInterruptEntry
sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
srsfd #0x13! ; Store return state on SVC stack
; We are already in SVC mode
stmfd SP!,{LR} ; Store the link register for the current mode
@@ -211,15 +213,26 @@ AsmCommonExceptionEntry
str R1, [SP, #0x40] ; Store it in EFI_SYSTEM_CONTEXT_ARM.CPSR
add R2, SP, #0x38 ; Make R2 point to EFI_SYSTEM_CONTEXT_ARM.LR
and R1, R1, #0x1f ; Check CPSR to see if User or System Mode
cmp R1, #0x1f ; if ((CPSR == 0x10) || (CPSR == 0x1df))
cmpne R1, #0x10 ;
and R3, R1, #0x1f ; Check CPSR to see if User or System Mode
cmp R3, #0x1f ; if ((CPSR == 0x10) || (CPSR == 0x1df))
cmpne R3, #0x10 ;
stmeqed R2, {lr}^ ; save unbanked lr
; else
stmneed R2, {lr} ; save SVC lr
ldr R1, [SP, #0x58] ; PC is the LR pushed by srsfd
str R1, [SP, #0x3c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.PC
ldr R5, [SP, #0x58] ; PC is the LR pushed by srsfd
; Check to see if we have to adjust for Thumb entry
sub r4, r0, #1 ; if (ExceptionType == 1 || ExceptionType ==2)) {
cmp r4, #1 ; // UND & SVC have differnt LR adjust for Thumb
bhi NoAdjustNeeded
tst r1, #0x20 ; if ((CPSR & T)) == T) { // Thumb Mode on entry
addne R5, R5, #2 ; PC += 2;
NoAdjustNeeded
str R5, [SP, #0x3c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.PC
sub R1, SP, #0x60 ; We pused 0x60 bytes on the stack
str R1, [SP, #0x34] ; Store it in EFI_SYSTEM_CONTEXT_ARM.SP
@@ -228,12 +241,13 @@ AsmCommonExceptionEntry
mov R1,SP ; R1 is SystemContext
/*
VOID
EFIAPI
CommonCExceptionHandler (
IN EFI_EXCEPTION_TYPE ExceptionType, R0
IN OUT EFI_SYSTEM_CONTEXT SystemContext R1
)
VOID
EFIAPI
CommonCExceptionHandler (
IN EFI_EXCEPTION_TYPE ExceptionType, R0
IN OUT EFI_SYSTEM_CONTEXT SystemContext R1
)
*/
blx CommonCExceptionHandler ; Call exception handler