673 lines
19 KiB
ArmAsm
673 lines
19 KiB
ArmAsm
/*
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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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*
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* (C) Copyright 2004
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* Texas Instruments, <www.ti.com>
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* Richard Woodruff <r-woodruff2@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <mach/io.h>
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#include <plat/control.h>
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#include "cm.h"
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#include "prm.h"
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#include "sdrc.h"
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#define SDRC_SCRATCHPAD_SEM_V 0xfa00291c
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#define PM_PREPWSTST_CORE_V OMAP34XX_PRM_REGADDR(CORE_MOD, \
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OMAP3430_PM_PREPWSTST)
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#define PM_PREPWSTST_CORE_P 0x48306AE8
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#define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \
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OMAP3430_PM_PREPWSTST)
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#define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + OMAP2_PM_PWSTCTRL
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#define CM_IDLEST1_CORE_V OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST1)
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#define SRAM_BASE_P 0x40200000
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#define CONTROL_STAT 0x480022F0
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#define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is
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* available */
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#define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE + OMAP343X_CONTROL_MEM_WKUP\
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+ SCRATCHPAD_MEM_OFFS)
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#define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER)
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#define SDRC_SYSCONFIG_P (OMAP343X_SDRC_BASE + SDRC_SYSCONFIG)
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#define SDRC_MR_0_P (OMAP343X_SDRC_BASE + SDRC_MR_0)
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#define SDRC_EMR2_0_P (OMAP343X_SDRC_BASE + SDRC_EMR2_0)
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#define SDRC_MANUAL_0_P (OMAP343X_SDRC_BASE + SDRC_MANUAL_0)
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#define SDRC_MR_1_P (OMAP343X_SDRC_BASE + SDRC_MR_1)
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#define SDRC_EMR2_1_P (OMAP343X_SDRC_BASE + SDRC_EMR2_1)
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#define SDRC_MANUAL_1_P (OMAP343X_SDRC_BASE + SDRC_MANUAL_1)
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#define SDRC_DLLA_STATUS_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS)
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#define SDRC_DLLA_CTRL_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL)
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.text
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/* Function to aquire the semaphore in scratchpad */
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ENTRY(lock_scratchpad_sem)
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stmfd sp!, {lr} @ save registers on stack
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wait_sem:
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mov r0,#1
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ldr r1, sdrc_scratchpad_sem
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wait_loop:
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ldr r2, [r1] @ load the lock value
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cmp r2, r0 @ is the lock free ?
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beq wait_loop @ not free...
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swp r2, r0, [r1] @ semaphore free so lock it and proceed
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cmp r2, r0 @ did we succeed ?
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beq wait_sem @ no - try again
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ldmfd sp!, {pc} @ restore regs and return
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sdrc_scratchpad_sem:
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.word SDRC_SCRATCHPAD_SEM_V
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ENTRY(lock_scratchpad_sem_sz)
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.word . - lock_scratchpad_sem
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.text
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/* Function to release the scratchpad semaphore */
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ENTRY(unlock_scratchpad_sem)
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stmfd sp!, {lr} @ save registers on stack
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ldr r3, sdrc_scratchpad_sem
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mov r2,#0
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str r2,[r3]
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ldmfd sp!, {pc} @ restore regs and return
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ENTRY(unlock_scratchpad_sem_sz)
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.word . - unlock_scratchpad_sem
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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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adr r0, restore
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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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.text
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/* Function call to get the restore pointer for for ES3 to resume from OFF */
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ENTRY(get_es3_restore_pointer)
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stmfd sp!, {lr} @ save registers on stack
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adr r0, restore_es3
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ldmfd sp!, {pc} @ restore regs and return
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ENTRY(get_es3_restore_pointer_sz)
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.word . - get_es3_restore_pointer
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ENTRY(es3_sdrc_fix)
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ldr r4, sdrc_syscfg @ get config addr
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ldr r5, [r4] @ get value
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tst r5, #0x100 @ is part access blocked
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it eq
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biceq r5, r5, #0x100 @ clear bit if set
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str r5, [r4] @ write back change
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ldr r4, sdrc_mr_0 @ get config addr
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ldr r5, [r4] @ get value
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str r5, [r4] @ write back change
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ldr r4, sdrc_emr2_0 @ get config addr
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ldr r5, [r4] @ get value
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str r5, [r4] @ write back change
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ldr r4, sdrc_manual_0 @ get config addr
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mov r5, #0x2 @ autorefresh command
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str r5, [r4] @ kick off refreshes
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ldr r4, sdrc_mr_1 @ get config addr
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ldr r5, [r4] @ get value
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str r5, [r4] @ write back change
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ldr r4, sdrc_emr2_1 @ get config addr
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ldr r5, [r4] @ get value
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str r5, [r4] @ write back change
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ldr r4, sdrc_manual_1 @ get config addr
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mov r5, #0x2 @ autorefresh command
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str r5, [r4] @ kick off refreshes
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bx lr
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sdrc_syscfg:
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.word SDRC_SYSCONFIG_P
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sdrc_mr_0:
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.word SDRC_MR_0_P
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sdrc_emr2_0:
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.word SDRC_EMR2_0_P
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sdrc_manual_0:
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.word SDRC_MANUAL_0_P
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sdrc_mr_1:
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.word SDRC_MR_1_P
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sdrc_emr2_1:
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.word SDRC_EMR2_1_P
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sdrc_manual_1:
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.word SDRC_MANUAL_1_P
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ENTRY(es3_sdrc_fix_sz)
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.word . - es3_sdrc_fix
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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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save_secure_ram_debug:
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/* b save_secure_ram_debug */ @ enable to debug save code
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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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and r3, r3, r12
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ldr r12, sram_phy_addr_mask
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orr r3, r3, r12
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mov r0, #25 @ 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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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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nop
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nop
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nop
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nop
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ldmfd sp!, {r1-r12, pc}
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sram_phy_addr_mask:
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.word SRAM_BASE_P
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high_mask:
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.word 0xffff
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api_params:
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.word 0x4, 0x0, 0x0, 0x1, 0x1
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ENTRY(save_secure_ram_context_sz)
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.word . - save_secure_ram_context
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/*
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* Forces OMAP into idle state
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*
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* omap34xx_suspend() - This bit of code just executes the WFI
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* for normal idles.
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*
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* Note: This code get's copied to internal SRAM at boot. When the OMAP
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* wakes up it continues execution at the point it went to sleep.
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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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loop:
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/*b loop*/ @Enable to debug by stepping through code
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/* r0 contains restore pointer in sdram */
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/* r1 contains information about saving context */
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ldr r4, sdrc_power @ read the SDRC_POWER register
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ldr r5, [r4] @ read the contents of SDRC_POWER
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orr r5, r5, #0x40 @ enable self refresh on idle req
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str r5, [r4] @ write back to SDRC_POWER register
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cmp r1, #0x0
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/* If context save is required, do that and execute wfi */
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bne save_context_wfi
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/* Data memory barrier and Data sync barrier */
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mov r1, #0
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mcr p15, 0, r1, c7, c10, 4
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mcr p15, 0, r1, c7, c10, 5
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wfi @ wait for interrupt
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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bl wait_sdrc_ok
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ldmfd sp!, {r0-r12, pc} @ restore regs and return
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restore_es3:
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/*b restore_es3*/ @ Enable to debug restore code
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ldr r5, pm_prepwstst_core_p
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ldr r4, [r5]
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and r4, r4, #0x3
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cmp r4, #0x0 @ Check if previous power state of CORE is OFF
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bne restore
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adr r0, es3_sdrc_fix
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ldr r1, sram_base
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ldr r2, es3_sdrc_fix_sz
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mov r2, r2, ror #2
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copy_to_sram:
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ldmia r0!, {r3} @ val = *src
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stmia r1!, {r3} @ *dst = val
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subs r2, r2, #0x1 @ num_words--
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bne copy_to_sram
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ldr r1, sram_base
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blx r1
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restore:
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/* b restore*/ @ Enable to debug restore code
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/* Check what was the reason for mpu reset and store the reason in r9*/
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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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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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movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation
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bne logic_l1_restore
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ldr r0, control_stat
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ldr r1, [r0]
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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 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 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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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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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 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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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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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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/* 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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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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logic_l1_restore:
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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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mcr p15, 0, r1, c7, c5, 0
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ldr r4, scratchpad_base
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ldr r3, [r4,#0xBC]
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adds r3, r3, #16
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ldmia r3!, {r4-r6}
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mov sp, r4
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msr spsr_cxsf, r5
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mov lr, r6
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ldmia r3!, {r4-r9}
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/* Coprocessor access Control Register */
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mcr p15, 0, r4, c1, c0, 2
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/* TTBR0 */
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MCR p15, 0, r5, c2, c0, 0
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/* TTBR1 */
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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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MCR p15, 0, r8, c3, c0, 0
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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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MCR p15, 0, r4, c5, c0, 1
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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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MCR p15, 0, r6, c5, c1, 1
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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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MCR p15, 0, r8, c6, c0, 2
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ldmia r3!,{r4-r7}
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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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MCR p15, 0, r5, c13, c0, 3
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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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MCR p15, 2, r7, c0, c0, 0
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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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MCR p15, 0, r5, c10, c0, 1
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/* Secure or Nonsecure Vector Base Address */
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MCR p15, 0, r6, c12, c0, 0
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/* FCSE PID */
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MCR p15, 0, r7, c13, c0, 0
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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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MCR p15, 0, r4, c10, c2, 0
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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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/* 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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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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b ttbr_error
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usettbr0:
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mrc p15, 0, r2, c2, c0, 0
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ldr r5, ttbrbit_mask
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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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/* 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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/* 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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/* 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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ldr r5, scratchpad_base
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str r2, [r5, #0xC4]
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mov r0, #0
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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:
|
|
/* read clidr */
|
|
mrc p15, 1, r0, c0, c0, 1
|
|
/* extract loc from clidr */
|
|
ands r3, r0, #0x7000000
|
|
/* left align loc bit field */
|
|
mov r3, r3, lsr #23
|
|
/* if loc is 0, then no need to clean */
|
|
beq finished
|
|
/* start clean at cache level 0 */
|
|
mov r10, #0
|
|
loop1:
|
|
/* work out 3x current cache level */
|
|
add r2, r10, r10, lsr #1
|
|
/* extract cache type bits from clidr*/
|
|
mov r1, r0, lsr r2
|
|
/* mask of the bits for current cache only */
|
|
and r1, r1, #7
|
|
/* see what cache we have at this level */
|
|
cmp r1, #2
|
|
/* skip if no cache, or just i-cache */
|
|
blt skip
|
|
/* select current cache level in cssr */
|
|
mcr p15, 2, r10, c0, c0, 0
|
|
/* isb to sych the new cssr&csidr */
|
|
isb
|
|
/* read the new csidr */
|
|
mrc p15, 1, r1, c0, c0, 0
|
|
/* extract the length of the cache lines */
|
|
and r2, r1, #7
|
|
/* add 4 (line length offset) */
|
|
add r2, r2, #4
|
|
ldr r4, assoc_mask
|
|
/* find maximum number on the way size */
|
|
ands r4, r4, r1, lsr #3
|
|
/* find bit position of way size increment */
|
|
clz r5, r4
|
|
ldr r7, numset_mask
|
|
/* extract max number of the index size*/
|
|
ands r7, r7, r1, lsr #13
|
|
loop2:
|
|
mov r9, r4
|
|
/* create working copy of max way size*/
|
|
loop3:
|
|
/* factor way and cache number into r11 */
|
|
orr r11, r10, r9, lsl r5
|
|
/* factor index number into r11 */
|
|
orr r11, r11, r7, lsl r2
|
|
/*clean & invalidate by set/way */
|
|
mcr p15, 0, r11, c7, c10, 2
|
|
/* decrement the way*/
|
|
subs r9, r9, #1
|
|
bge loop3
|
|
/*decrement the index */
|
|
subs r7, r7, #1
|
|
bge loop2
|
|
skip:
|
|
add r10, r10, #2
|
|
/* increment cache number */
|
|
cmp r3, r10
|
|
bgt loop1
|
|
finished:
|
|
/*swith back to cache level 0 */
|
|
mov r10, #0
|
|
/* select current cache level in cssr */
|
|
mcr p15, 2, r10, c0, c0, 0
|
|
isb
|
|
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:
|
|
ldr r4, cm_idlest1_core
|
|
ldr r5, [r4]
|
|
and r5, r5, #0x2
|
|
cmp r5, #0
|
|
bne wait_sdrc_ok
|
|
ldr r4, sdrc_power
|
|
ldr r5, [r4]
|
|
bic r5, r5, #0x40
|
|
str r5, [r4]
|
|
wait_dll_lock:
|
|
/* Is dll in lock mode? */
|
|
ldr r4, sdrc_dlla_ctrl
|
|
ldr r5, [r4]
|
|
tst r5, #0x4
|
|
bxne lr
|
|
/* wait till dll locks */
|
|
ldr r4, sdrc_dlla_status
|
|
ldr r5, [r4]
|
|
and r5, r5, #0x4
|
|
cmp r5, #0x4
|
|
bne wait_dll_lock
|
|
bx lr
|
|
|
|
cm_idlest1_core:
|
|
.word CM_IDLEST1_CORE_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
|
|
ENTRY(omap34xx_cpu_suspend_sz)
|
|
.word . - omap34xx_cpu_suspend
|