openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/arch/arm/mach-omap2/sleep34xx.S

722 lines
20 KiB
ArmAsm
Raw Blame History

/*
* linux/arch/arm/mach-omap2/sleep.S
*
* (C) Copyright 2007
* Texas Instruments
* Karthik Dasu <karthik-dp@ti.com>
*
* (C) Copyright 2004
* Texas Instruments, <www.ti.com>
* Richard Woodruff <r-woodruff2@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <mach/io.h>
#include "cm.h"
#include "prm.h"
#include "sdrc.h"
#include "control.h"
#define SDRC_SCRATCHPAD_SEM_V 0xfa00291c
#define PM_PREPWSTST_CORE_V OMAP34XX_PRM_REGADDR(CORE_MOD, \
OMAP3430_PM_PREPWSTST)
#define PM_PREPWSTST_CORE_P 0x48306AE8
#define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \
OMAP3430_PM_PREPWSTST)
#define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + OMAP2_PM_PWSTCTRL
#define CM_IDLEST1_CORE_V OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST1)
#define CM_IDLEST_CKGEN_V OMAP34XX_CM_REGADDR(PLL_MOD, CM_IDLEST)
#define SRAM_BASE_P 0x40200000
#define CONTROL_STAT 0x480022F0
#define CONTROL_MEM_RTA_CTRL (OMAP343X_CTRL_BASE\
+ OMAP36XX_CONTROL_MEM_RTA_CTRL)
#define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is
* available */
#define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE + OMAP343X_CONTROL_MEM_WKUP\
+ SCRATCHPAD_MEM_OFFS)
#define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER)
#define SDRC_SYSCONFIG_P (OMAP343X_SDRC_BASE + SDRC_SYSCONFIG)
#define SDRC_MR_0_P (OMAP343X_SDRC_BASE + SDRC_MR_0)
#define SDRC_EMR2_0_P (OMAP343X_SDRC_BASE + SDRC_EMR2_0)
#define SDRC_MANUAL_0_P (OMAP343X_SDRC_BASE + SDRC_MANUAL_0)
#define SDRC_MR_1_P (OMAP343X_SDRC_BASE + SDRC_MR_1)
#define SDRC_EMR2_1_P (OMAP343X_SDRC_BASE + SDRC_EMR2_1)
#define SDRC_MANUAL_1_P (OMAP343X_SDRC_BASE + SDRC_MANUAL_1)
#define SDRC_DLLA_STATUS_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS)
#define SDRC_DLLA_CTRL_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL)
.text
/* Function to acquire the semaphore in scratchpad */
ENTRY(lock_scratchpad_sem)
stmfd sp!, {lr} @ save registers on stack
wait_sem:
mov r0,#1
ldr r1, sdrc_scratchpad_sem
wait_loop:
ldr r2, [r1] @ load the lock value
cmp r2, r0 @ is the lock free ?
beq wait_loop @ not free...
swp r2, r0, [r1] @ semaphore free so lock it and proceed
cmp r2, r0 @ did we succeed ?
beq wait_sem @ no - try again
ldmfd sp!, {pc} @ restore regs and return
sdrc_scratchpad_sem:
.word SDRC_SCRATCHPAD_SEM_V
ENTRY(lock_scratchpad_sem_sz)
.word . - lock_scratchpad_sem
.text
/* Function to release the scratchpad semaphore */
ENTRY(unlock_scratchpad_sem)
stmfd sp!, {lr} @ save registers on stack
ldr r3, sdrc_scratchpad_sem
mov r2,#0
str r2,[r3]
ldmfd sp!, {pc} @ restore regs and return
ENTRY(unlock_scratchpad_sem_sz)
.word . - unlock_scratchpad_sem
.text
/* Function call to get the restore pointer for resume from OFF */
ENTRY(get_restore_pointer)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore
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)
stmfd sp!, {lr} @ save registers on stack
adr r0, restore_3630
ldmfd sp!, {pc} @ restore regs and return
ENTRY(get_omap3630_restore_pointer_sz)
.word . - get_omap3630_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
* place on 3630. Hopefully some version in the future maynot need this
*/
ENTRY(enable_omap3630_toggle_l2_on_restore)
stmfd sp!, {lr} @ save registers on stack
/* Setup so that we will disable and enable l2 */
mov r1, #0x1
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
save_secure_ram_debug:
/* b save_secure_ram_debug */ @ enable to debug save code
adr r3, api_params @ r3 points to parameters
str r0, [r3,#0x4] @ r0 has sdram address
ldr r12, high_mask
and r3, r3, r12
ldr r12, sram_phy_addr_mask
orr r3, r3, r12
mov r0, #25 @ set service ID for PPA
mov r12, r0 @ copy secure service ID in r12
mov r1, #0 @ set task id for ROM code in r1
mov r2, #4 @ set some flags in r2, r6
mov r6, #0xff
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
.word 0xE1600071 @ call SMI monitor (smi #1)
nop
nop
nop
nop
ldmfd sp!, {r1-r12, pc}
sram_phy_addr_mask:
.word SRAM_BASE_P
high_mask:
.word 0xffff
api_params:
.word 0x4, 0x0, 0x0, 0x1, 0x1
ENTRY(save_secure_ram_context_sz)
.word . - save_secure_ram_context
/*
* Forces OMAP into idle state
*
* omap34xx_suspend() - This bit of code just executes the WFI
* for normal idles.
*
* Note: This code get's copied to internal SRAM at boot. When the OMAP
* wakes up it continues execution at the point it went to sleep.
*/
ENTRY(omap34xx_cpu_suspend)
stmfd sp!, {r0-r12, lr} @ save registers on stack
loop:
/*b loop*/ @Enable to debug by stepping through code
/* r0 contains restore pointer in sdram */
/* r1 contains information about saving context */
ldr r4, sdrc_power @ read the SDRC_POWER register
ldr r5, [r4] @ read the contents of SDRC_POWER
orr r5, r5, #0x40 @ enable self refresh on idle req
str r5, [r4] @ write back to SDRC_POWER register
cmp r1, #0x0
/* If context save is required, do that and execute wfi */
bne save_context_wfi
/* Data memory barrier and Data sync barrier */
mov r1, #0
mcr p15, 0, r1, c7, c10, 4
mcr p15, 0, r1, c7, c10, 5
wfi @ wait for interrupt
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
bl wait_sdrc_ok
ldmfd sp!, {r0-r12, pc} @ restore regs and return
restore_es3:
/*b restore_es3*/ @ Enable to debug restore code
ldr r5, pm_prepwstst_core_p
ldr r4, [r5]
and r4, r4, #0x3
cmp r4, #0x0 @ Check if previous power state of CORE is OFF
bne restore
adr r0, es3_sdrc_fix
ldr r1, sram_base
ldr r2, es3_sdrc_fix_sz
mov r2, r2, ror #2
copy_to_sram:
ldmia r0!, {r3} @ val = *src
stmia r1!, {r3} @ *dst = val
subs r2, r2, #0x1 @ num_words--
bne copy_to_sram
ldr r1, sram_base
blx r1
b restore
restore_3630:
/*b restore_es3630*/ @ Enable to debug restore code
ldr r1, pm_prepwstst_core_p
ldr r2, [r1]
and r2, r2, #0x3
cmp r2, #0x0 @ Check if previous power state of CORE is OFF
bne restore
/* Disable RTA before giving control */
ldr r1, control_mem_rta
mov r2, #OMAP36XX_RTA_DISABLE
str r2, [r1]
/* Fall thru for the remaining logic */
restore:
/* b restore*/ @ Enable to debug restore code
/* Check what was the reason for mpu reset and store the reason in r9*/
/* 1 - Only L1 and logic lost */
/* 2 - Only L2 lost - In this case, we wont be here */
/* 3 - Both L1 and L2 lost */
ldr r1, pm_pwstctrl_mpu
ldr r2, [r1]
and r2, r2, #0x3
cmp r2, #0x0 @ Check if target power state was OFF or RET
moveq r9, #0x3 @ MPU OFF => L1 and L2 lost
movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation
bne logic_l1_restore
ldr r0, l2dis_3630
cmp r0, #0x1 @ should we disable L2 on 3630?
bne skipl2dis
mrc p15, 0, r0, c1, c0, 1
bic r0, r0, #2 @ disable L2 cache
mcr p15, 0, r0, c1, c0, 1
skipl2dis:
ldr r0, control_stat
ldr r1, [r0]
and r1, #0x700
cmp r1, #0x300
beq l2_inv_gp
mov r0, #40 @ set service ID for PPA
mov r12, r0 @ copy secure Service ID in r12
mov r1, #0 @ set task id for ROM code in r1
mov r2, #4 @ set some flags in r2, r6
mov r6, #0xff
adr r3, l2_inv_api_params @ r3 points to dummy parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
.word 0xE1600071 @ call SMI monitor (smi #1)
/* Write to Aux control register to set some bits */
mov r0, #42 @ set service ID for PPA
mov r12, r0 @ copy secure Service ID in r12
mov r1, #0 @ set task id for ROM code in r1
mov r2, #4 @ set some flags in r2, r6
mov r6, #0xff
ldr r4, scratchpad_base
ldr r3, [r4, #0xBC] @ r3 points to parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
.word 0xE1600071 @ call SMI monitor (smi #1)
#ifdef CONFIG_OMAP3_L2_AUX_SECURE_SAVE_RESTORE
/* Restore L2 aux control register */
@ set service ID for PPA
mov r0, #CONFIG_OMAP3_L2_AUX_SECURE_SERVICE_SET_ID
mov r12, r0 @ copy service ID in r12
mov r1, #0 @ set task ID for ROM code in r1
mov r2, #4 @ set some flags in r2, r6
mov r6, #0xff
ldr r4, scratchpad_base
ldr r3, [r4, #0xBC]
adds r3, r3, #8 @ r3 points to parameters
mcr p15, 0, r0, c7, c10, 4 @ data write barrier
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
.word 0xE1600071 @ call SMI monitor (smi #1)
#endif
b logic_l1_restore
l2_inv_api_params:
.word 0x1, 0x00
l2_inv_gp:
/* Execute smi to invalidate L2 cache */
mov r12, #0x1 @ set up to invalide L2
smi: .word 0xE1600070 @ Call SMI monitor (smieq)
/* Write to Aux control register to set some bits */
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
ldr r0, [r3,#4]
mov r12, #0x3
.word 0xE1600070 @ Call SMI monitor (smieq)
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
ldr r0, [r3,#12]
mov r12, #0x2
.word 0xE1600070 @ Call SMI monitor (smieq)
logic_l1_restore:
ldr r1, l2dis_3630
cmp r1, #0x1 @ Do we need to re-enable L2 on 3630?
bne skipl2reen
mrc p15, 0, r1, c1, c0, 1
orr r1, r1, #2 @ re-enable L2 cache
mcr p15, 0, r1, c1, c0, 1
skipl2reen:
mov r1, #0
/* Invalidate all instruction caches to PoU
* and flush branch target cache */
mcr p15, 0, r1, c7, c5, 0
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
adds r3, r3, #16
ldmia r3!, {r4-r6}
mov sp, r4
msr spsr_cxsf, r5
mov lr, r6
ldmia r3!, {r4-r9}
/* Coprocessor access Control Register */
mcr p15, 0, r4, c1, c0, 2
/* TTBR0 */
MCR p15, 0, r5, c2, c0, 0
/* TTBR1 */
MCR p15, 0, r6, c2, c0, 1
/* Translation table base control register */
MCR p15, 0, r7, c2, c0, 2
/*domain access Control Register */
MCR p15, 0, r8, c3, c0, 0
/* data fault status Register */
MCR p15, 0, r9, c5, c0, 0
ldmia r3!,{r4-r8}
/* instruction fault status Register */
MCR p15, 0, r4, c5, c0, 1
/*Data Auxiliary Fault Status Register */
MCR p15, 0, r5, c5, c1, 0
/*Instruction Auxiliary Fault Status Register*/
MCR p15, 0, r6, c5, c1, 1
/*Data Fault Address Register */
MCR p15, 0, r7, c6, c0, 0
/*Instruction Fault Address Register*/
MCR p15, 0, r8, c6, c0, 2
ldmia r3!,{r4-r7}
/* user r/w thread and process ID */
MCR p15, 0, r4, c13, c0, 2
/* user ro thread and process ID */
MCR p15, 0, r5, c13, c0, 3
/*Privileged only thread and process ID */
MCR p15, 0, r6, c13, c0, 4
/* cache size selection */
MCR p15, 2, r7, c0, c0, 0
ldmia r3!,{r4-r8}
/* Data TLB lockdown registers */
MCR p15, 0, r4, c10, c0, 0
/* Instruction TLB lockdown registers */
MCR p15, 0, r5, c10, c0, 1
/* Secure or Nonsecure Vector Base Address */
MCR p15, 0, r6, c12, c0, 0
/* FCSE PID */
MCR p15, 0, r7, c13, c0, 0
/* Context PID */
MCR p15, 0, r8, c13, c0, 1
ldmia r3!,{r4-r5}
/* primary memory remap register */
MCR p15, 0, r4, c10, c2, 0
/*normal memory remap register */
MCR p15, 0, r5, c10, c2, 1
/* Restore cpsr */
ldmia r3!,{r4} /*load CPSR from SDRAM*/
msr cpsr, r4 /*store cpsr */
/* Enabling MMU here */
mrc p15, 0, r7, c2, c0, 2 /* Read TTBRControl */
/* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1*/
and r7, #0x7
cmp r7, #0x0
beq usettbr0
ttbr_error:
/* More work needs to be done to support N[0:2] value other than 0
* So looping here so that the error can be detected
*/
b ttbr_error
usettbr0:
mrc p15, 0, r2, c2, c0, 0
ldr r5, ttbrbit_mask
and r2, r5
mov r4, pc
ldr r5, table_index_mask
and r4, r5 /* r4 = 31 to 20 bits of pc */
/* Extract the value to be written to table entry */
ldr r1, table_entry
add r1, r1, r4 /* r1 has value to be written to table entry*/
/* Getting the address of table entry to modify */
lsr r4, #18
add r2, r4 /* r2 has the location which needs to be modified */
/* Storing previous entry of location being modified */
ldr r5, scratchpad_base
ldr r4, [r2]
str r4, [r5, #0xC0]
/* Modify the table entry */
str r1, [r2]
/* Storing address of entry being modified
* - will be restored after enabling MMU */
ldr r5, scratchpad_base
str r2, [r5, #0xC4]
mov r0, #0
mcr p15, 0, r0, c7, c5, 4 @ Flush prefetch buffer
mcr p15, 0, r0, c7, c5, 6 @ Invalidate branch predictor array
mcr p15, 0, r0, c8, c5, 0 @ Invalidate instruction TLB
mcr p15, 0, r0, c8, c6, 0 @ Invalidate data TLB
/* Restore control register but dont enable caches here*/
/* Caches will be enabled after restoring MMU table entry */
ldmia r3!, {r4}
/* Store previous value of control register in scratchpad */
str r4, [r5, #0xC8]
ldr r2, cache_pred_disable_mask
and r4, r2
mcr p15, 0, r4, c1, c0, 0
ldmfd sp!, {r0-r12, pc} @ restore regs and return
save_context_wfi:
/*b save_context_wfi*/ @ enable to debug save code
mov r8, r0 /* Store SDRAM address in r8 */
mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register
mov r4, #0x1 @ Number of parameters for restore call
stmia r8!, {r4-r5} @ Push parameters for restore call
mrc p15, 1, r5, c9, c0, 2 @ Read L2 AUX ctrl register
stmia r8!, {r4-r5} @ Push parameters for restore call
/* Check what that target sleep state is:stored in r1*/
/* 1 - Only L1 and logic lost */
/* 2 - Only L2 lost */
/* 3 - Both L1 and L2 lost */
cmp r1, #0x2 /* Only L2 lost */
beq clean_l2
cmp r1, #0x1 /* L2 retained */
/* r9 stores whether to clean L2 or not*/
moveq r9, #0x0 /* Dont Clean L2 */
movne r9, #0x1 /* Clean L2 */
l1_logic_lost:
/* Store sp and spsr to SDRAM */
mov r4, sp
mrs r5, spsr
mov r6, lr
stmia r8!, {r4-r6}
/* Save all ARM registers */
/* Coprocessor access control register */
mrc p15, 0, r6, c1, c0, 2
stmia r8!, {r6}
/* TTBR0, TTBR1 and Translation table base control */
mrc p15, 0, r4, c2, c0, 0
mrc p15, 0, r5, c2, c0, 1
mrc p15, 0, r6, c2, c0, 2
stmia r8!, {r4-r6}
/* Domain access control register, data fault status register,
and instruction fault status register */
mrc p15, 0, r4, c3, c0, 0
mrc p15, 0, r5, c5, c0, 0
mrc p15, 0, r6, c5, c0, 1
stmia r8!, {r4-r6}
/* Data aux fault status register, instruction aux fault status,
datat fault address register and instruction fault address register*/
mrc p15, 0, r4, c5, c1, 0
mrc p15, 0, r5, c5, c1, 1
mrc p15, 0, r6, c6, c0, 0
mrc p15, 0, r7, c6, c0, 2
stmia r8!, {r4-r7}
/* user r/w thread and process ID, user r/o thread and process ID,
priv only thread and process ID, cache size selection */
mrc p15, 0, r4, c13, c0, 2
mrc p15, 0, r5, c13, c0, 3
mrc p15, 0, r6, c13, c0, 4
mrc p15, 2, r7, c0, c0, 0
stmia r8!, {r4-r7}
/* Data TLB lockdown, instruction TLB lockdown registers */
mrc p15, 0, r5, c10, c0, 0
mrc p15, 0, r6, c10, c0, 1
stmia r8!, {r5-r6}
/* Secure or non secure vector base address, FCSE PID, Context PID*/
mrc p15, 0, r4, c12, c0, 0
mrc p15, 0, r5, c13, c0, 0
mrc p15, 0, r6, c13, c0, 1
stmia r8!, {r4-r6}
/* Primary remap, normal remap registers */
mrc p15, 0, r4, c10, c2, 0
mrc p15, 0, r5, c10, c2, 1
stmia r8!,{r4-r5}
/* Store current cpsr*/
mrs r2, cpsr
stmia r8!, {r2}
mrc p15, 0, r4, c1, c0, 0
/* save control register */
stmia r8!, {r4}
clean_caches:
/* Clean Data or unified cache to POU*/
/* How to invalidate only L1 cache???? - #FIX_ME# */
/* mcr p15, 0, r11, c7, c11, 1 */
cmp r9, #1 /* Check whether L2 inval is required or not*/
bne skip_l2_inval
clean_l2:
/*
* Jump out to kernel flush routine
* - reuse that code is better
* - it executes in a cached space so is faster than refetch per-block
* - should be faster and will change with kernel
* - 'might' have to copy address, load and jump to it
* - lr is used since we are running in SRAM currently.
*/
ldr r1, kernel_flush
mov lr, pc
bx r1
skip_l2_inval:
/* Data memory barrier and Data sync barrier */
mov r1, #0
mcr p15, 0, r1, c7, c10, 4
mcr p15, 0, r1, c7, c10, 5
wfi @ wait for interrupt
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
bl wait_sdrc_ok
/* restore regs and return */
ldmfd sp!, {r0-r12, pc}
/* Make sure SDRC accesses are ok */
wait_sdrc_ok:
/* DPLL3 must be locked before accessing the SDRC. Maybe the HW ensures this. */
ldr r4, cm_idlest_ckgen
wait_dpll3_lock:
ldr r5, [r4]
tst r5, #1
beq wait_dpll3_lock
ldr r4, cm_idlest1_core
wait_sdrc_ready:
ldr r5, [r4]
tst r5, #0x2
bne wait_sdrc_ready
/* allow DLL powerdown upon hw idle req */
ldr r4, sdrc_power
ldr r5, [r4]
bic r5, r5, #0x40
str r5, [r4]
is_dll_in_lock_mode:
/* Is dll in lock mode? */
ldr r4, sdrc_dlla_ctrl
ldr r5, [r4]
tst r5, #0x4
bxne lr
/* wait till dll locks */
wait_dll_lock_timed:
ldr r4, wait_dll_lock_counter
add r4, r4, #1
str r4, wait_dll_lock_counter
ldr r4, sdrc_dlla_status
mov r6, #8 /* Wait 20uS for lock */
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
/* 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 */
str r6, [r4]
dsb
orr r6, r6, #(1<<3) /* enable dll */
str r6, [r4]
dsb
ldr r4, kick_counter
add r4, r4, #1
str r4, kick_counter
b wait_dll_lock_timed
cm_idlest1_core:
.word CM_IDLEST1_CORE_V
cm_idlest_ckgen:
.word CM_IDLEST_CKGEN_V
sdrc_dlla_status:
.word SDRC_DLLA_STATUS_V
sdrc_dlla_ctrl:
.word SDRC_DLLA_CTRL_V
pm_prepwstst_core:
.word PM_PREPWSTST_CORE_V
pm_prepwstst_core_p:
.word PM_PREPWSTST_CORE_P
pm_prepwstst_mpu:
.word PM_PREPWSTST_MPU_V
pm_pwstctrl_mpu:
.word PM_PWSTCTRL_MPU_P
scratchpad_base:
.word SCRATCHPAD_BASE_P
sram_base:
.word SRAM_BASE_P + 0x8000
sdrc_power:
.word SDRC_POWER_V
clk_stabilize_delay:
.word 0x000001FF
assoc_mask:
.word 0x3ff
numset_mask:
.word 0x7fff
ttbrbit_mask:
.word 0xFFFFC000
table_index_mask:
.word 0xFFF00000
table_entry:
.word 0x00000C02
cache_pred_disable_mask:
.word 0xFFFFE7FB
control_stat:
.word CONTROL_STAT
control_mem_rta:
.word CONTROL_MEM_RTA_CTRL
kernel_flush:
.word v7_flush_dcache_all
l2dis_3630:
.word 0
/*
* When exporting to userspace while the counters are in SRAM,
* these 2 words need to be at the end to facilitate retrival!
*/
kick_counter:
.word 0
wait_dll_lock_counter:
.word 0
ENTRY(omap34xx_cpu_suspend_sz)
.word . - omap34xx_cpu_suspend
Reference in New Issue View Git Blame Copy Permalink