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OMAP3: re-organize the ASM sleep code
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Organize the code in the following sections:
- register access macros,
- API functions,
- internal functions.

Tested on N900 and Beagleboard with full RET and OFF modes,
using cpuidle and suspend.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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Jean Pihet authored and Kevin Hilman committed Dec 21, 2010
1 parent fe360e1 commit 1e81bc0
Showing 1 changed file with 61 additions and 53 deletions.
114 changes: 61 additions & 53 deletions arch/arm/mach-omap2/sleep34xx.S
Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,7 @@ ENTRY(get_restore_pointer)
ldmfd sp!, {pc} @ restore regs and return
ENTRY(get_restore_pointer_sz)
.word . - get_restore_pointer

.text
/* Function call to get the restore pointer for 3630 resume from OFF */
ENTRY(get_omap3630_restore_pointer)
Expand All @@ -88,10 +89,19 @@ ENTRY(get_omap3630_restore_pointer)
ENTRY(get_omap3630_restore_pointer_sz)
.word . - get_omap3630_restore_pointer

.text
/* Function call to get the restore pointer for ES3 to resume from OFF */
ENTRY(get_es3_restore_pointer)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore_es3
ldmfd sp!, {pc} @ restore regs and return
ENTRY(get_es3_restore_pointer_sz)
.word . - get_es3_restore_pointer

.text
/*
* L2 cache needs to be toggled for stable OFF mode functionality on 3630.
* This function sets up a fflag that will allow for this toggling to take
* This function sets up a flag that will allow for this toggling to take
* place on 3630. Hopefully some version in the future maynot need this
*/
ENTRY(enable_omap3630_toggle_l2_on_restore)
Expand All @@ -101,58 +111,6 @@ ENTRY(enable_omap3630_toggle_l2_on_restore)
str r1, l2dis_3630
ldmfd sp!, {pc} @ restore regs and return

.text
/* Function call to get the restore pointer for for ES3 to resume from OFF */
ENTRY(get_es3_restore_pointer)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore_es3
ldmfd sp!, {pc} @ restore regs and return
ENTRY(get_es3_restore_pointer_sz)
.word . - get_es3_restore_pointer

ENTRY(es3_sdrc_fix)
ldr r4, sdrc_syscfg @ get config addr
ldr r5, [r4] @ get value
tst r5, #0x100 @ is part access blocked
it eq
biceq r5, r5, #0x100 @ clear bit if set
str r5, [r4] @ write back change
ldr r4, sdrc_mr_0 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_emr2_0 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_manual_0 @ get config addr
mov r5, #0x2 @ autorefresh command
str r5, [r4] @ kick off refreshes
ldr r4, sdrc_mr_1 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_emr2_1 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_manual_1 @ get config addr
mov r5, #0x2 @ autorefresh command
str r5, [r4] @ kick off refreshes
bx lr
sdrc_syscfg:
.word SDRC_SYSCONFIG_P
sdrc_mr_0:
.word SDRC_MR_0_P
sdrc_emr2_0:
.word SDRC_EMR2_0_P
sdrc_manual_0:
.word SDRC_MANUAL_0_P
sdrc_mr_1:
.word SDRC_MR_1_P
sdrc_emr2_1:
.word SDRC_EMR2_1_P
sdrc_manual_1:
.word SDRC_MANUAL_1_P
ENTRY(es3_sdrc_fix_sz)
.word . - es3_sdrc_fix

/* Function to call rom code to save secure ram context */
ENTRY(save_secure_ram_context)
stmfd sp!, {r1-r12, lr} @ save registers on stack
Expand Down Expand Up @@ -578,6 +536,56 @@ skip_l2_inval:
/* restore regs and return */
ldmfd sp!, {r0-r12, pc}


/*
* Internal functions
*/

.text
ENTRY(es3_sdrc_fix)
ldr r4, sdrc_syscfg @ get config addr
ldr r5, [r4] @ get value
tst r5, #0x100 @ is part access blocked
it eq
biceq r5, r5, #0x100 @ clear bit if set
str r5, [r4] @ write back change
ldr r4, sdrc_mr_0 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_emr2_0 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_manual_0 @ get config addr
mov r5, #0x2 @ autorefresh command
str r5, [r4] @ kick off refreshes
ldr r4, sdrc_mr_1 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_emr2_1 @ get config addr
ldr r5, [r4] @ get value
str r5, [r4] @ write back change
ldr r4, sdrc_manual_1 @ get config addr
mov r5, #0x2 @ autorefresh command
str r5, [r4] @ kick off refreshes
bx lr

sdrc_syscfg:
.word SDRC_SYSCONFIG_P
sdrc_mr_0:
.word SDRC_MR_0_P
sdrc_emr2_0:
.word SDRC_EMR2_0_P
sdrc_manual_0:
.word SDRC_MANUAL_0_P
sdrc_mr_1:
.word SDRC_MR_1_P
sdrc_emr2_1:
.word SDRC_EMR2_1_P
sdrc_manual_1:
.word SDRC_MANUAL_1_P
ENTRY(es3_sdrc_fix_sz)
.word . - es3_sdrc_fix

/* Make sure SDRC accesses are ok */
wait_sdrc_ok:

Expand Down

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