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More corrections to AVR assembly macros 

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3705 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo 2011-06-15 18:34:21 +00:00
parent dee4eb9488
commit e300da65e4
3 changed files with 26 additions and 46 deletions
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4
nuttx/arch/avr/src/at90usb/at90usb_exceptions.S
View File

@ -129,8 +129,8 @@ excpt_common:
* the push operation post-decrements -- need to REVISIT this).
*/
in r16, __SP_L__ /* Get the save structure pointer in a Call-saved register pair */
in r17, __SP_H__ /* (Careful, push post-decrements) */
in r16, _SFR_IO_ADDR(SPL) /* Get the save structure pointer in a Call-saved register pair */
in r17, _SFR_IO_ADDR(SPH) /* (Careful, push post-decrements) */
movw r22, r16 /* Pass register save structure as the parameter 2 */
USE_INTSTACK rx, ry, rz /* Switch to the interrupt stack */
call up_doirq /* Dispatch the interrupt */

4
nuttx/arch/avr/src/atmega/atmega_exceptions.S
View File

@ -122,8 +122,8 @@ excpt_common:
* the push operation post-decrements -- need to REVISIT this).
*/
in r16, __SP_L__ /* Get the save structure pointer in a Call-saved register pair */
in r17, __SP_H__ /* (Careful, push post-decrements) */
in r16, _SFR_IO_ADDR(SPL) /* Get the save structure pointer in a Call-saved register pair */
in r17, _SFR_IO_ADDR(SPH) /* (Careful, push post-decrements) */
movw r22, r16 /* Pass register save structure as the parameter 2 */
USE_INTSTACK rx, ry, rz /* Switch to the interrupt stack */
call up_doirq /* Dispatch the interrupt */

64
nuttx/arch/avr/src/avr/excptmacros.h
View File

@ -57,26 +57,6 @@
* Pre-processor Definitions
********************************************************************************************/
#ifndef __SREG__
# define __SREG__ 0x3f
#endif
#ifndef __SP_H__
# define __SP_H__ 0x3e
#endif
#ifndef __SP_L__
# define __SP_L__ 0x3d
#endif
#ifndef __tmp_reg__
# define __tmp_reg__ r0
#endif
#ifndef __zero_reg__
# define __zero_reg__ r1
#endif
/********************************************************************************************
* Global Symbols
********************************************************************************************/
@ -97,8 +77,8 @@
* ...
* my_exception:
* EXCPT_PROLOGUE - Save registers on stack
* in r22, __SP_L__ - Pass register save structure as the parameter 2
* in r23, __SP_H__ - (Careful, push post-decrements)
* in r22, _SFR_IO_ADDR(SPL) - Pass register save structure as the parameter 2
* in r23, _SFR_IO_ADDR(SPH) - (Careful, push post-decrements)
* USE_INTSTACK rx, ry, rz - Switch to the interrupt stack
* call handler - Handle the exception IN=old regs OUT=new regs
* RESTORE_STACK rx, ry - Undo the operations of USE_INTSTACK
@ -173,8 +153,8 @@
/* Save the status register on the stack */
in r0, __SREG__ /* Save the status register */
cli /* Disable interrupts */
in r0, _SFR_IO_ADDR(SREG) /* Save the status register */
cli /* Disable interrupts */
push r0
/* Save R1 -- the zero register (which may not be zero). R1 must be zero for our purposes */
@ -232,11 +212,11 @@
* it was on entry into this macro. We'll have to subtract to get that value.
*/
in r26, __SP_L__
in r27, __SP_H__
in r26, _SFR_IO_ADDR(SPL)
in r27, _SFR_IO_ADDR(SPH)
adiw r26, XCPTCONTEXT_REGS
push r26
push r26 /* SPL then SPH */
push r27
.endm
@ -261,8 +241,8 @@
/* We don't need to restore the stack pointer */
pop r27
pop r26
pop r27 /* Discard SPH */
pop r26 /* Discard SPL */
/* Restore r26-r27 */
@ -317,7 +297,7 @@
/* Restore the status register (probably enabling interrupts) */
pop r0 /* Restore the status register */
out __SREG__, r0
out _SFR_IO_ADDR(SREG), r0
/* Finally, restore r0 and r24 - the scratch and IRQ number registers */
@ -345,11 +325,11 @@
.macro USER_SAVE
/* Save the current stack pointer. */
/* Save the current stack pointer (SPH then SPL). */
in r24, __SP_L__
st x+, r24
in r25, __SP_H__
in r25, _SFR_IO_ADDR(SPH)
st x+, r25
in r24, _SFR_IO_ADDR(SPL)
st x+, r24
/* Skip over r26-r27 and r30-r31 - Call-used, "volatile" registers */
@ -391,7 +371,7 @@
/* Save the status register (probably not necessary since interrupts are disabled) */
in r0, __SREG__
in r0, _SFR_IO_ADDR(SREG)
st x+, r0
/* Skip R0 and r24 - These are scratch register and Call-used, "volatile" registers */
@ -428,10 +408,10 @@
/* Fetch the new stack pointer */
ld r24, x+ /* Fetch stack pointer (post-incrementing) */
out __SP_L__, r24
ld r25, x+
out __SP_H__, r25
ld r25, x+ /* Fetch stack pointer (post-incrementing) */
out _SFR_IO_ADDR(SPH), r25 /* (SPH then SPL) */
ld r24, x+
out _SFR_IO_ADDR(SPL), r24
/* Fetch the return address and save it at the bottom of the new stack so
* that we can iret to switch contexts.
@ -439,9 +419,9 @@
movw r28, r26 /* Get a pointer to the PCH/PCL storage location */
adiw r28, REG_PCH
ld r25, y+ /* Load PCH and PCL */
ld r25, y+ /* Load PCH (r25) and PCL (r24) */
ld r24, y+
push r24 /* Push PCH and PCL on the stack */
push r24 /* Push PCH and PCL on the stack (PCL then PCH) */
push r25
/* Then get value of X [r26:r27]. Save X on the new stack where we can
@ -501,7 +481,7 @@
/* Restore the status register (probably enabling interrupts) */
ld r0, x+
out __SREG__, r0
out _SFR_IO_ADDR(SREG), r0
/* Restore r0 and r241 - The scratch and IRQ number registers */