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Fix comments and reg frame offsets

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@460 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2007-12-29 23:47:22 +00:00
parent 8cd5eddc98
commit 1afeed4d05
4 changed files with 41 additions and 42 deletions
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18
arch/z80/include/z80/irq.h
View file

@ -60,15 +60,15 @@
* in the TCB to many context switches.
*/
#define XCPT_I (0) /* Saved I w/interrupt state in carry */
#define XCPT_AF (1) /* Saved AF register */
#define XCPT_BC (2) /* Saved BC register */
#define XCPT_DE (3) /* Saved DE register */
#define XCPT_HL (4) /* Saved HL register */
#define XCPT_IX (5) /* Saved IX register */
#define XCPT_IY (6) /* Saved IY register */
#define XCPT_SP (7) /* Offset to SP at time of interrupt */
#define XCPT_PC (8) /* Offset to PC at time of interrupt */
#define XCPT_I (0) /* Offset 0: Saved I w/interrupt state in carry */
#define XCPT_AF (1) /* Offset 1: Saved AF register */
#define XCPT_BC (2) /* Offset 2: Saved BC register */
#define XCPT_DE (3) /* Offset 3: Saved DE register */
#define XCPT_HL (4) /* Offset 4: Saved HL register */
#define XCPT_IX (5) /* Offset 5: Saved IX register */
#define XCPT_IY (6) /* Offset 6: Saved IY register */
#define XCPT_SP (7) /* Offset 7: Offset to SP at time of interrupt */
#define XCPT_PC (8) /* Offset 8: Offset to PC at time of interrupt */
#define XCPTCONTEXT_REGS (9)
#define XCPTCONTEXT_SIZE (2 * XCPTCONTEXT_REGS)

27
arch/z80/src/common/up_head.asm
View file

@ -42,15 +42,15 @@
; Register save area layout
XCPT_PC == 0 ; Offset to PC at time of interrupt
XCPT_AF == 2 ; Saved AF register
XCPT_HL == 4 ; Saved HL register
XCPT_SP == 6 ; Offset to SP at time of interrupt
XCPT_IY == 8 ; Saved IY register
XCPT_IX == 10 ; Saved IX register
XCPT_DE == 12 ; Saved DE register
XCPT_BC == 14 ; Saved BC register
XCPT_I == 16 ; Saved I w/interrupt state in carry
XCPT_I == 0 ; Offset 0: Saved I w/interrupt state in carry
XCPT_BC == 2 ; Offset 1: Saved BC register
XCPT_DE == 4 ; Offset 2: Saved DE register
XCPT_IX == 6 ; Offset 3: Saved IX register
XCPT_IY == 8 ; Offset 4: Saved IY register
XCPT_SP == 10 ; Offset 5: Offset to SP at time of interrupt
XCPT_HL == 12 ; Offset 6: Saved HL register
XCPT_AF == 14 ; Offset 7: Saved AF register
XCPT_PC == 16 ; Offset 8: Offset to PC at time of interrupt
; Default stack base (needs to be fixed)
@ -99,7 +99,7 @@ forever:
; Offset 8: Return PC is already on the stack
push af ; Offset 7: AF (retaining flags)
push hl ; Offset 6: HL
ld hl, #-(3*2) ; HL is the value of the stack pointer before
ld hl, #(3*2) ; HL is the value of the stack pointer before
add hl, sp ; the interrupt occurred
push hl ; Offset 5: Stack pointer
push iy ; Offset 4: IY
@ -111,11 +111,10 @@ forever:
push af ; Offset 0: I with interrupt state in carry
di
; Call the interrupt decode logic
; SP points to the beggining of the reg structure
; Call the interrupt decode logic. SP points to the beggining of the reg structure
ld hl, #0 ; Argument is the beginning of the reg structure
add hl, sp
push hl
add hl, sp ;
push hl ;
call _up_decodeirq ; Decode the IRQ
; Restore registers. HL points to the beginning of the reg structure to restore

18
arch/z80/src/common/up_restoreusercontext.asm
View file

@ -35,15 +35,15 @@
; Register save area layout
.globl XCPT_I ; Saved I w/interrupt state in carry
.globl XCPT_AF ; Saved AF register
.globl XCPT_BC ; Saved BC register
.globl XCPT_DE ; Saved DE register
.globl XCPT_HL ; Saved HL register
.globl XCPT_IX ; Saved IX register
.globl XCPT_IY ; Saved IY register
.globl XCPT_SP ; Offset to SP at time of interrupt
.globl XCPT_PC ; Offset to PC at time of interrupt
.globl XCPT_I ; Offset 0: Saved I w/interrupt state in carry
.globl XCPT_BC ; Offset 1: Saved BC register
.globl XCPT_DE ; Offset 2: Saved DE register
.globl XCPT_IX ; Offset 3: Saved IX register
.globl XCPT_IY ; Offset 4: Saved IY register
.globl XCPT_SP ; Offset 5: Offset to SP at time of interrupt
.globl XCPT_HL ; Offset 6: Saved HL register
.globl XCPT_AF ; Offset 7: Saved AF register
.globl XCPT_PC ; Offset 8: Offset to PC at time of interrupt
;**************************************************************************
; up_restoreusercontext

20
arch/z80/src/common/up_saveusercontext.asm
View file

@ -39,15 +39,15 @@
; Register save area layout
.globl XCPT_I ; Saved I w/interrupt state in carry
.globl XCPT_AF ; Saved AF register
.globl XCPT_BC ; Saved BC register
.globl XCPT_DE ; Saved DE register
.globl XCPT_HL ; Saved HL register
.globl XCPT_IX ; Saved IX register
.globl XCPT_IY ; Saved IY register
.globl XCPT_SP ; Offset to SP at time of interrupt
.globl XCPT_PC ; Offset to PC at time of interrupt
.globl XCPT_I ; Offset 0: Saved I w/interrupt state in carry
.globl XCPT_BC ; Offset 1: Saved BC register
.globl XCPT_DE ; Offset 2: Saved DE register
.globl XCPT_IX ; Offset 3: Saved IX register
.globl XCPT_IY ; Offset 4: Saved IY register
.globl XCPT_SP ; Offset 5: Offset to SP at time of interrupt
.globl XCPT_HL ; Offset 6: Saved HL register
.globl XCPT_AF ; Offset 7: Saved AF register
.globl XCPT_PC ; Offset 8: Offset to PC at time of interrupt
; Stack frame
@ -56,7 +56,7 @@
FRAME_RET == 4 ; Location of return address on the stack
FRAME_REGS == 6 ; Location of reg save area on stack
SP_OFFSET == -6
SP_OFFSET == 6
;*************************************************************************
; Name: up_saveusercontext