diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2014-10-13 18:13:35 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2015-06-19 18:09:34 +0530 |
| commit | 09f3b37e4e3bbe22444617c273a3c046aade5db2 (patch) | |
| tree | b3f4bb8e144576aa0de20e2810a0fdbc857c1b1b /arch/arc/include/asm/entry.h | |
| parent | fbfa26ae3b2001d0885938175f9af5a4c50a528c (diff) | |
ARC: entry.S: Introduce INTERRUPT_{PROLOGUE,EPILOGUE}
-common'ize macros for level 1 and level 2 interrupts
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include/asm/entry.h')
| -rw-r--r-- | arch/arc/include/asm/entry.h | 77 |
1 files changed, 19 insertions, 58 deletions
diff --git a/arch/arc/include/asm/entry.h b/arch/arc/include/asm/entry.h index 9e844ab5eede..934bb835106f 100644 --- a/arch/arc/include/asm/entry.h +++ b/arch/arc/include/asm/entry.h @@ -465,55 +465,37 @@ /* orig_r0, ECR, user_r25 skipped automatically */ .endm +/* Dummy ECR values for Interrupts */ +#define event_IRQ1 0x0031abcd +#define event_IRQ2 0x0032abcd -/*-------------------------------------------------------------- - * Save all registers used by interrupt handlers. - *-------------------------------------------------------------*/ -.macro SAVE_ALL_INT1 +.macro INTERRUPT_PROLOGUE LVL - /* restore original r9 */ - PROLOG_RESTORE_REG r9, @int1_saved_reg + /* free up r9 as scratchpad */ + PROLOG_FREEUP_REG r9, @int\LVL\()_saved_reg - /* now we are ready to save the remaining context :) */ - st event_IRQ1, [sp, 8] /* Dummy ECR */ - st 0, [sp, 4] /* orig_r0 , N/A for IRQ */ + /* Which mode (user/kernel) was the system in when intr occurred */ + lr r9, [status32_l\LVL\()] - SAVE_R0_TO_R12 - PUSH gp - PUSH fp - PUSH blink - PUSH ilink1 - PUSHAX status32_l1 - PUSH lp_count - PUSHAX lp_end - PUSHAX lp_start - PUSHAX bta_l1 -.endm - -.macro SAVE_ALL_INT2 + SWITCH_TO_KERNEL_STK - /* - * In SMP we can't use mem nor can we use SCRARCH_DATA0 - * as we do for int1 because int2 can clobber it - * Hence 2 levels of intr are NOT allowed in SMP (by Kconfig) - */ /* restore original r9 */ - PROLOG_RESTORE_REG r9, @int2_saved_reg + PROLOG_RESTORE_REG r9, @int\LVL\()_saved_reg - /* now we are ready to save the remaining context :) */ - st event_IRQ2, [sp, 8] /* Dummy ECR */ + /* now we are ready to save the remaining context */ + st 0x003\LVL\()abcd, [sp, 8] /* Dummy ECR */ st 0, [sp, 4] /* orig_r0 , N/A for IRQ */ SAVE_R0_TO_R12 PUSH gp PUSH fp PUSH blink - PUSH ilink2 - PUSHAX status32_l2 + PUSH ilink\LVL\() + PUSHAX status32_l\LVL\() PUSH lp_count PUSHAX lp_end PUSHAX lp_start - PUSHAX bta_l2 + PUSHAX bta_l\LVL\() .endm /*-------------------------------------------------------------- @@ -525,17 +507,16 @@ * for memory load operations. If used in that way interrupts are deffered * by hardware and that is not good. *-------------------------------------------------------------*/ - -.macro RESTORE_ALL_INT1 - POPAX bta_l1 +.macro INTERRUPT_EPILOGUE LVL + POPAX bta_l\LVL\() POPAX lp_start POPAX lp_end POP r9 mov lp_count, r9 ;LD to lp_count is not allowed - POPAX status32_l1 - POP ilink1 + POPAX status32_l\LVL\() + POP ilink\LVL\() POP blink POP fp POP gp @@ -545,26 +526,6 @@ /* orig_r0, ECR, user_r25 skipped automatically */ .endm -.macro RESTORE_ALL_INT2 - POPAX bta_l2 - POPAX lp_start - POPAX lp_end - - POP r9 - mov lp_count, r9 ;LD to lp_count is not allowed - - POPAX status32_l2 - POP ilink2 - POP blink - POP fp - POP gp - RESTORE_R12_TO_R0 - - ld sp, [sp] /* restore original sp */ - /* orig_r0, ECR, user_r25 skipped automatically */ -.endm - - /* Get CPU-ID of this core */ .macro GET_CPU_ID reg lr \reg, [identity] |