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OMAP3: ASM sleep code format rework
Cosmetic fixes to the code: - white spaces and tabs, - alignement, - comments rephrase and typos, - multi-line comments 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>
This commit is contained in:
Jean Pihet
Kevin Hilman
parent
8352129166
commit
bb1c9034b3
@ -1,6 +1,4 @@
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/*
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* linux/arch/arm/mach-omap2/sleep.S
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*
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* (C) Copyright 2007
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* Texas Instruments
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* Karthik Dasu <karthik-dp@ti.com>
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@ -81,20 +79,20 @@
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.text
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/* Function call to get the restore pointer for resume from OFF */
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ENTRY(get_restore_pointer)
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stmfd sp!, {lr} @ save registers on stack
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stmfd sp!, {lr} @ save registers on stack
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adr r0, restore
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ldmfd sp!, {pc} @ restore regs and return
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ldmfd sp!, {pc} @ restore regs and return
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ENTRY(get_restore_pointer_sz)
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.word . - get_restore_pointer
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.word . - get_restore_pointer
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.text
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/* Function call to get the restore pointer for 3630 resume from OFF */
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ENTRY(get_omap3630_restore_pointer)
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stmfd sp!, {lr} @ save registers on stack
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stmfd sp!, {lr} @ save registers on stack
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adr r0, restore_3630
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ldmfd sp!, {pc} @ restore regs and return
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ldmfd sp!, {pc} @ restore regs and return
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ENTRY(get_omap3630_restore_pointer_sz)
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.word . - get_omap3630_restore_pointer
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.word . - get_omap3630_restore_pointer
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.text
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/* Function call to get the restore pointer for ES3 to resume from OFF */
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@ -112,16 +110,16 @@ ENTRY(get_es3_restore_pointer_sz)
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* place on 3630. Hopefully some version in the future may not need this.
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*/
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ENTRY(enable_omap3630_toggle_l2_on_restore)
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stmfd sp!, {lr} @ save registers on stack
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stmfd sp!, {lr} @ save registers on stack
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/* Setup so that we will disable and enable l2 */
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mov r1, #0x1
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str r1, l2dis_3630
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ldmfd sp!, {pc} @ restore regs and return
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ldmfd sp!, {pc} @ restore regs and return
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.text
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/* Function to call rom code to save secure ram context */
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ENTRY(save_secure_ram_context)
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stmfd sp!, {r1-r12, lr} @ save registers on stack
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adr r3, api_params @ r3 points to parameters
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str r0, [r3,#0x4] @ r0 has sdram address
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ldr r12, high_mask
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@ -165,14 +163,14 @@ ENTRY(save_secure_ram_context_sz)
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*
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*
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* Notes:
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* - this code gets copied to internal SRAM at boot. The execution pointer
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* in SRAM is _omap_sram_idle.
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* - this code gets copied to internal SRAM at boot and after wake-up
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* from OFF mode. The execution pointer in SRAM is _omap_sram_idle.
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* - when the OMAP wakes up it continues at different execution points
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* depending on the low power mode (non-OFF vs OFF modes),
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* cf. 'Resume path for xxx mode' comments.
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*/
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ENTRY(omap34xx_cpu_suspend)
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stmfd sp!, {r0-r12, lr} @ save registers on stack
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stmfd sp!, {r0-r12, lr} @ save registers on stack
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/*
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* r0 contains restore pointer in sdram
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@ -280,9 +278,9 @@ clean_l2:
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* - should be faster and will change with kernel
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* - 'might' have to copy address, load and jump to it
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*/
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ldr r1, kernel_flush
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mov lr, pc
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bx r1
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ldr r1, kernel_flush
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mov lr, pc
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bx r1
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omap3_do_wfi:
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ldr r4, sdrc_power @ read the SDRC_POWER register
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@ -375,18 +373,18 @@ restore_3630:
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/* Fall through to common code for the remaining logic */
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restore:
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/*
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/*
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* Check what was the reason for mpu reset and store the reason in r9:
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* 0 - No context lost
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* 1 - Only L1 and logic lost
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* 2 - Only L2 lost - In this case, we wont be here
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* 3 - Both L1 and L2 lost
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* 1 - Only L1 and logic lost
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* 2 - Only L2 lost - In this case, we wont be here
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* 3 - Both L1 and L2 lost
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*/
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ldr r1, pm_pwstctrl_mpu
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ldr r1, pm_pwstctrl_mpu
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ldr r2, [r1]
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and r2, r2, #0x3
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cmp r2, #0x0 @ Check if target power state was OFF or RET
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moveq r9, #0x3 @ MPU OFF => L1 and L2 lost
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and r2, r2, #0x3
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cmp r2, #0x0 @ Check if target power state was OFF or RET
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moveq r9, #0x3 @ MPU OFF => L1 and L2 lost
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movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation
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bne logic_l1_restore
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@ -402,71 +400,74 @@ skipl2dis:
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and r1, #0x700
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cmp r1, #0x300
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beq l2_inv_gp
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mov r0, #40 @ set service ID for PPA
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mov r12, r0 @ copy secure Service ID in r12
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mov r1, #0 @ set task id for ROM code in r1
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mov r2, #4 @ set some flags in r2, r6
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mov r0, #40 @ set service ID for PPA
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mov r12, r0 @ copy secure Service ID in r12
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mov r1, #0 @ set task id for ROM code in r1
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mov r2, #4 @ set some flags in r2, r6
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mov r6, #0xff
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adr r3, l2_inv_api_params @ r3 points to dummy parameters
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mcr p15, 0, r0, c7, c10, 4 @ data write barrier
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mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
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.word 0xE1600071 @ call SMI monitor (smi #1)
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/* Write to Aux control register to set some bits */
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mov r0, #42 @ set service ID for PPA
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mov r12, r0 @ copy secure Service ID in r12
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mov r1, #0 @ set task id for ROM code in r1
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mov r2, #4 @ set some flags in r2, r6
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mov r0, #42 @ set service ID for PPA
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mov r12, r0 @ copy secure Service ID in r12
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mov r1, #0 @ set task id for ROM code in r1
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mov r2, #4 @ set some flags in r2, r6
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mov r6, #0xff
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ldr r4, scratchpad_base
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ldr r3, [r4, #0xBC] @ r3 points to parameters
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ldr r3, [r4, #0xBC] @ r3 points to parameters
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mcr p15, 0, r0, c7, c10, 4 @ data write barrier
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mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
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.word 0xE1600071 @ call SMI monitor (smi #1)
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#ifdef CONFIG_OMAP3_L2_AUX_SECURE_SAVE_RESTORE
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/* Restore L2 aux control register */
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@ set service ID for PPA
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@ set service ID for PPA
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mov r0, #CONFIG_OMAP3_L2_AUX_SECURE_SERVICE_SET_ID
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mov r12, r0 @ copy service ID in r12
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mov r1, #0 @ set task ID for ROM code in r1
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mov r2, #4 @ set some flags in r2, r6
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mov r12, r0 @ copy service ID in r12
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mov r1, #0 @ set task ID for ROM code in r1
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mov r2, #4 @ set some flags in r2, r6
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mov r6, #0xff
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ldr r4, scratchpad_base
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ldr r3, [r4, #0xBC]
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adds r3, r3, #8 @ r3 points to parameters
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adds r3, r3, #8 @ r3 points to parameters
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mcr p15, 0, r0, c7, c10, 4 @ data write barrier
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mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
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.word 0xE1600071 @ call SMI monitor (smi #1)
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#endif
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b logic_l1_restore
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l2_inv_api_params:
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.word 0x1, 0x00
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.word 0x1, 0x00
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l2_inv_gp:
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/* Execute smi to invalidate L2 cache */
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mov r12, #0x1 @ set up to invalide L2
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smi: .word 0xE1600070 @ Call SMI monitor (smieq)
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mov r12, #0x1 @ set up to invalidate L2
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.word 0xE1600070 @ Call SMI monitor (smieq)
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/* Write to Aux control register to set some bits */
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ldr r4, scratchpad_base
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ldr r3, [r4,#0xBC]
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ldr r0, [r3,#4]
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mov r12, #0x3
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.word 0xE1600070 @ Call SMI monitor (smieq)
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.word 0xE1600070 @ Call SMI monitor (smieq)
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ldr r4, scratchpad_base
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ldr r3, [r4,#0xBC]
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ldr r0, [r3,#12]
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mov r12, #0x2
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.word 0xE1600070 @ Call SMI monitor (smieq)
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.word 0xE1600070 @ Call SMI monitor (smieq)
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logic_l1_restore:
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ldr r1, l2dis_3630
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cmp r1, #0x1 @ Do we need to re-enable L2 on 3630?
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cmp r1, #0x1 @ Test if L2 re-enable needed on 3630
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bne skipl2reen
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mrc p15, 0, r1, c1, c0, 1
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orr r1, r1, #2 @ re-enable L2 cache
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orr r1, r1, #2 @ re-enable L2 cache
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mcr p15, 0, r1, c1, c0, 1
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skipl2reen:
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mov r1, #0
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/* Invalidate all instruction caches to PoU
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* and flush branch target cache */
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/*
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* Invalidate all instruction caches to PoU
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* and flush branch target cache
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*/
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mcr p15, 0, r1, c7, c5, 0
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ldr r4, scratchpad_base
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@ -487,33 +488,33 @@ skipl2reen:
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MCR p15, 0, r6, c2, c0, 1
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/* Translation table base control register */
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MCR p15, 0, r7, c2, c0, 2
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/*domain access Control Register */
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/* Domain access Control Register */
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MCR p15, 0, r8, c3, c0, 0
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/* data fault status Register */
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/* Data fault status Register */
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MCR p15, 0, r9, c5, c0, 0
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ldmia r3!,{r4-r8}
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/* instruction fault status Register */
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ldmia r3!,{r4-r8}
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/* Instruction fault status Register */
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MCR p15, 0, r4, c5, c0, 1
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/*Data Auxiliary Fault Status Register */
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/* Data Auxiliary Fault Status Register */
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MCR p15, 0, r5, c5, c1, 0
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/*Instruction Auxiliary Fault Status Register*/
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/* Instruction Auxiliary Fault Status Register*/
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MCR p15, 0, r6, c5, c1, 1
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/*Data Fault Address Register */
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/* Data Fault Address Register */
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MCR p15, 0, r7, c6, c0, 0
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/*Instruction Fault Address Register*/
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/* Instruction Fault Address Register*/
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MCR p15, 0, r8, c6, c0, 2
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ldmia r3!,{r4-r7}
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ldmia r3!,{r4-r7}
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/* user r/w thread and process ID */
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/* User r/w thread and process ID */
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MCR p15, 0, r4, c13, c0, 2
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/* user ro thread and process ID */
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/* User ro thread and process ID */
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MCR p15, 0, r5, c13, c0, 3
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/*Privileged only thread and process ID */
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/* Privileged only thread and process ID */
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MCR p15, 0, r6, c13, c0, 4
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/* cache size selection */
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/* Cache size selection */
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MCR p15, 2, r7, c0, c0, 0
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ldmia r3!,{r4-r8}
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ldmia r3!,{r4-r8}
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/* Data TLB lockdown registers */
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MCR p15, 0, r4, c10, c0, 0
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/* Instruction TLB lockdown registers */
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@ -525,26 +526,27 @@ skipl2reen:
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/* Context PID */
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MCR p15, 0, r8, c13, c0, 1
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ldmia r3!,{r4-r5}
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/* primary memory remap register */
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ldmia r3!,{r4-r5}
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/* Primary memory remap register */
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MCR p15, 0, r4, c10, c2, 0
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/*normal memory remap register */
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/* Normal memory remap register */
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MCR p15, 0, r5, c10, c2, 1
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/* Restore cpsr */
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ldmia r3!,{r4} /*load CPSR from SDRAM*/
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msr cpsr, r4 /*store cpsr */
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ldmia r3!,{r4} @ load CPSR from SDRAM
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msr cpsr, r4 @ store cpsr
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/* Enabling MMU here */
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mrc p15, 0, r7, c2, c0, 2 /* Read TTBRControl */
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/* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1*/
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mrc p15, 0, r7, c2, c0, 2 @ Read TTBRControl
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/* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1 */
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and r7, #0x7
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cmp r7, #0x0
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beq usettbr0
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ttbr_error:
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/* More work needs to be done to support N[0:2] value other than 0
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* So looping here so that the error can be detected
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*/
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/*
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* More work needs to be done to support N[0:2] value other than 0
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* So looping here so that the error can be detected
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*/
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b ttbr_error
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usettbr0:
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mrc p15, 0, r2, c2, c0, 0
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@ -552,21 +554,25 @@ usettbr0:
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and r2, r5
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mov r4, pc
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ldr r5, table_index_mask
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and r4, r5 /* r4 = 31 to 20 bits of pc */
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and r4, r5 @ r4 = 31 to 20 bits of pc
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/* Extract the value to be written to table entry */
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ldr r1, table_entry
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add r1, r1, r4 /* r1 has value to be written to table entry*/
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/* r1 has the value to be written to table entry*/
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add r1, r1, r4
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/* Getting the address of table entry to modify */
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lsr r4, #18
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add r2, r4 /* r2 has the location which needs to be modified */
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/* r2 has the location which needs to be modified */
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add r2, r4
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/* Storing previous entry of location being modified */
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ldr r5, scratchpad_base
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ldr r4, [r2]
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str r4, [r5, #0xC0]
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/* Modify the table entry */
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str r1, [r2]
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/* Storing address of entry being modified
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* - will be restored after enabling MMU */
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/*
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* Storing address of entry being modified
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* - will be restored after enabling MMU
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*/
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ldr r5, scratchpad_base
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str r2, [r5, #0xC4]
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@ -575,8 +581,11 @@ usettbr0:
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mcr p15, 0, r0, c7, c5, 6 @ Invalidate branch predictor array
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mcr p15, 0, r0, c8, c5, 0 @ Invalidate instruction TLB
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mcr p15, 0, r0, c8, c6, 0 @ Invalidate data TLB
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/* Restore control register but dont enable caches here*/
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/* Caches will be enabled after restoring MMU table entry */
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/*
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* Restore control register. This enables the MMU.
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* The caches and prediction are not enabled here, they
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* will be enabled after restoring the MMU table entry.
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*/
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ldmia r3!, {r4}
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/* Store previous value of control register in scratchpad */
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str r4, [r5, #0xC8]
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@ -589,7 +598,7 @@ usettbr0:
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* == Exit point from OFF mode ==
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* ==============================
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*/
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ldmfd sp!, {r0-r12, pc} @ restore regs and return
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ldmfd sp!, {r0-r12, pc} @ restore regs and return
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/*
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@ -655,55 +664,56 @@ ENTRY(es3_sdrc_fix_sz)
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/* Make sure SDRC accesses are ok */
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wait_sdrc_ok:
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/* DPLL3 must be locked before accessing the SDRC. Maybe the HW ensures this. */
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/* DPLL3 must be locked before accessing the SDRC. Maybe the HW ensures this */
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ldr r4, cm_idlest_ckgen
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wait_dpll3_lock:
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ldr r5, [r4]
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tst r5, #1
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beq wait_dpll3_lock
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ldr r4, cm_idlest1_core
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ldr r4, cm_idlest1_core
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wait_sdrc_ready:
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ldr r5, [r4]
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tst r5, #0x2
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bne wait_sdrc_ready
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ldr r5, [r4]
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tst r5, #0x2
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bne wait_sdrc_ready
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/* allow DLL powerdown upon hw idle req */
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ldr r4, sdrc_power
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ldr r5, [r4]
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bic r5, r5, #0x40
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str r5, [r4]
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is_dll_in_lock_mode:
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ldr r4, sdrc_power
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ldr r5, [r4]
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bic r5, r5, #0x40
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str r5, [r4]
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/* Is dll in lock mode? */
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ldr r4, sdrc_dlla_ctrl
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ldr r5, [r4]
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tst r5, #0x4
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bxne lr
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/* wait till dll locks */
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is_dll_in_lock_mode:
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/* Is dll in lock mode? */
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ldr r4, sdrc_dlla_ctrl
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ldr r5, [r4]
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tst r5, #0x4
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bxne lr @ Return if locked
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/* wait till dll locks */
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wait_dll_lock_timed:
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ldr r4, wait_dll_lock_counter
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add r4, r4, #1
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str r4, wait_dll_lock_counter
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ldr r4, sdrc_dlla_status
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mov r6, #8 /* Wait 20uS for lock */
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/* Wait 20uS for lock */
|
||||
mov r6, #8
|
||||
wait_dll_lock:
|
||||
subs r6, r6, #0x1
|
||||
beq kick_dll
|
||||
ldr r5, [r4]
|
||||
and r5, r5, #0x4
|
||||
cmp r5, #0x4
|
||||
bne wait_dll_lock
|
||||
bx lr
|
||||
ldr r5, [r4]
|
||||
and r5, r5, #0x4
|
||||
cmp r5, #0x4
|
||||
bne wait_dll_lock
|
||||
bx lr @ Return when locked
|
||||
|
||||
/* disable/reenable DLL if not locked */
|
||||
kick_dll:
|
||||
ldr r4, sdrc_dlla_ctrl
|
||||
ldr r5, [r4]
|
||||
mov r6, r5
|
||||
bic r6, #(1<<3) /* disable dll */
|
||||
bic r6, #(1<<3) @ disable dll
|
||||
str r6, [r4]
|
||||
dsb
|
||||
orr r6, r6, #(1<<3) /* enable dll */
|
||||
orr r6, r6, #(1<<3) @ enable dll
|
||||
str r6, [r4]
|
||||
dsb
|
||||
ldr r4, kick_counter
|
||||
@ -728,7 +738,7 @@ scratchpad_base:
|
||||
sram_base:
|
||||
.word SRAM_BASE_P + 0x8000
|
||||
sdrc_power:
|
||||
.word SDRC_POWER_V
|
||||
.word SDRC_POWER_V
|
||||
ttbrbit_mask:
|
||||
.word 0xFFFFC000
|
||||
table_index_mask:
|
||||
@ -742,9 +752,9 @@ control_stat:
|
||||
control_mem_rta:
|
||||
.word CONTROL_MEM_RTA_CTRL
|
||||
kernel_flush:
|
||||
.word v7_flush_dcache_all
|
||||
.word v7_flush_dcache_all
|
||||
l2dis_3630:
|
||||
.word 0
|
||||
.word 0
|
||||
/*
|
||||
* When exporting to userspace while the counters are in SRAM,
|
||||
* these 2 words need to be at the end to facilitate retrival!
|
||||
|
||||
Loading…
Reference in New Issue
Block a user