-/* linux/arch/arm/mach-s3c2410/sleep.S
+/* linux/arch/arm/plat-s3c24xx/sleep.S
*
* Copyright (c) 2004 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
#include <linux/linkage.h>
#include <asm/assembler.h>
-#include <asm/hardware.h>
-#include <asm/arch/map.h>
+#include <mach/hardware.h>
+#include <mach/map.h>
-#include <asm/arch/regs-gpio.h>
-#include <asm/arch/regs-clock.h>
-#include <asm/arch/regs-mem.h>
-#include <asm/arch/regs-serial.h>
+#include <mach/regs-gpio.h>
+#include <mach/regs-clock.h>
+#include <mach/regs-mem.h>
+#include <plat/regs-serial.h>
/* CONFIG_DEBUG_RESUME is dangerous if your bootloader does not
* reset the UART configuration, only enable if you really need this!
.text
- /* s3c2410_cpu_save
- *
- * save enough of the CPU state to allow us to re-start
- * pm.c code. as we store items like the sp/lr, we will
- * end up returning from this function when the cpu resumes
- * so the return value is set to mark this.
- *
- * This arangement means we avoid having to flush the cache
- * from this code.
+ /* s3c_cpu_save
*
* entry:
- * r0 = pointer to save block
- *
- * exit:
- * r0 = 0 => we stored everything
- * 1 => resumed from sleep
+ * r0 = save address (virtual addr of s3c_sleep_save_phys)
*/
-ENTRY(s3c2410_cpu_save)
+ENTRY(s3c_cpu_save)
stmfd sp!, { r4 - r12, lr }
@@ store co-processor registers
- mrc p15, 0, r4, c15, c1, 0 @ CP access register
- mrc p15, 0, r5, c13, c0, 0 @ PID
- mrc p15, 0, r6, c3, c0, 0 @ Domain ID
- mrc p15, 0, r7, c2, c0, 0 @ translation table base address
- mrc p15, 0, r8, c1, c0, 0 @ control register
+ mrc p15, 0, r4, c13, c0, 0 @ PID
+ mrc p15, 0, r5, c3, c0, 0 @ Domain ID
+ mrc p15, 0, r6, c2, c0, 0 @ translation table base address
+ mrc p15, 0, r7, c1, c0, 0 @ control register
stmia r0, { r4 - r13 }
- mov r0, #0
- ldmfd sp, { r4 - r12, pc }
+ @@ write our state back to RAM
+ bl s3c_pm_cb_flushcache
+ @@ jump to final code to send system to sleep
+ ldr r0, =pm_cpu_sleep
+ @@ldr pc, [ r0 ]
+ ldr r0, [ r0 ]
+ mov pc, r0
+
@@ return to the caller, after having the MMU
@@ turned on, this restores the last bits from the
@@ stack
resume_with_mmu:
- mov r0, #1
ldmfd sp!, { r4 - r12, pc }
.ltorg
@@ the next bits sit in the .data segment, even though they
- @@ happen to be code... the s3c2410_sleep_save_phys needs to be
+ @@ happen to be code... the s3c_sleep_save_phys needs to be
@@ accessed by the resume code before it can restore the MMU.
@@ This means that the variable has to be close enough for the
@@ code to read it... since the .text segment needs to be RO,
.data
- .global s3c2410_sleep_save_phys
-s3c2410_sleep_save_phys:
+ .global s3c_sleep_save_phys
+s3c_sleep_save_phys:
.word 0
- /* s3c2410_cpu_resume
+
+ /* sleep magic, to allow the bootloader to check for an valid
+ * image to resume to. Must be the first word before the
+ * s3c_cpu_resume entry.
+ */
+
+ .word 0x2bedf00d
+
+ /* s3c_cpu_resume
*
* resume code entry for bootloader to call
*
* must not write to the code segment (code is read-only)
*/
-ENTRY(s3c2410_cpu_resume)
+ENTRY(s3c_cpu_resume)
mov r0, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
msr cpsr_c, r0
mcr p15, 0, r1, c8, c7, 0 @@ invalidate I & D TLBs
mcr p15, 0, r1, c7, c7, 0 @@ invalidate I & D caches
- ldr r0, s3c2410_sleep_save_phys @ address of restore block
+ ldr r0, s3c_sleep_save_phys @ address of restore block
ldmia r0, { r4 - r13 }
- mcr p15, 0, r4, c15, c1, 0 @ CP access register
- mcr p15, 0, r5, c13, c0, 0 @ PID
- mcr p15, 0, r6, c3, c0, 0 @ Domain ID
- mcr p15, 0, r7, c2, c0, 0 @ translation table base
+ mcr p15, 0, r4, c13, c0, 0 @ PID
+ mcr p15, 0, r5, c3, c0, 0 @ Domain ID
+ mcr p15, 0, r6, c2, c0, 0 @ translation table base
#ifdef CONFIG_DEBUG_RESUME
mov r3, #'R'
#endif
ldr r2, =resume_with_mmu
- mcr p15, 0, r8, c1, c0, 0 @ turn on MMU, etc
+ mcr p15, 0, r7, c1, c0, 0 @ turn on MMU, etc
nop @ second-to-last before mmu
mov pc, r2 @ go back to virtual address
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff