/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Enter and leave deep sleep state on MPC83xx
*
* Copyright ( c ) 2006 - 2008 Freescale Semiconductor , Inc .
* Author : Scott Wood < scottwood @ freescale . com >
*/
#include <asm/page.h>
#include <asm/ppc_asm.h>
#include <asm/reg.h>
#include <asm/asm-offsets.h>
#define SS_MEMSAVE 0 x00 /* First 8 bytes of RAM */
#define SS_HID 0 x08 /* 3 HIDs */
#define SS_IABR 0 x14 /* 2 IABRs */
#define SS_IBCR 0 x1c
#define SS_DABR 0 x20 /* 2 DABRs */
#define SS_DBCR 0 x28
#define SS_SP 0 x2c
#define SS_SR 0 x30 /* 16 segment registers */
#define SS_R2 0 x70
#define SS_MSR 0 x74
#define SS_SDR1 0 x78
#define SS_LR 0 x7c
#define SS_SPRG 0 x80 /* 8 SPRGs */
#define SS_DBAT 0 xa0 /* 8 DBATs */
#define SS_IBAT 0 xe0 /* 8 IBATs */
#define SS_TB 0 x120
#define SS_CR 0 x128
#define SS_GPREG 0 x12c /* r12-r31 */
#define STATE_SAVE_SIZE 0 x17c
.section .data
.align 5
mpc83xx_sleep_save_area:
.space STATE_SAVE_SIZE
immrbase:
.long 0
.section .text
.align 5
/* r3 = physical address of IMMR */
_GLOBAL (mpc83xx_enter_deep_sleep)
lis r4, immrbase@ha
stw r3, immrbase@l(r4)
/* The first 2 words of memory are used to communicate with the
* bootloader , to tell it how to resume .
*
* The first word is the magic number 0 xf5153ae5 , and the second
* is the pointer to mpc83xx_deep_resume .
*
* The original content of these two words is saved in SS_MEMSAVE .
*/
lis r3, mpc83xx_sleep_save_area@h
ori r3, r3, mpc83xx_sleep_save_area@l
lis r4, KERNELBASE@h
lwz r5, 0 (r4)
lwz r6, 4 (r4)
stw r5, SS_MEMSAVE+0 (r3)
stw r6, SS_MEMSAVE+4 (r3)
mfspr r5, SPRN_HID0
mfspr r6, SPRN_HID1
/* FIXME: Should this use SPRN_HID2_G2_LE? */
mfspr r7, SPRN_HID2_750FX
stw r5, SS_HID+0 (r3)
stw r6, SS_HID+4 (r3)
stw r7, SS_HID+8 (r3)
mfspr r4, SPRN_IABR
mfspr r5, SPRN_IABR2
mfspr r6, SPRN_IBCR
mfspr r7, SPRN_DABR
mfspr r8, SPRN_DABR2
mfspr r9, SPRN_DBCR
stw r4, SS_IABR+0 (r3)
stw r5, SS_IABR+4 (r3)
stw r6, SS_IBCR(r3)
stw r7, SS_DABR+0 (r3)
stw r8, SS_DABR+4 (r3)
stw r9, SS_DBCR(r3)
mfspr r4, SPRN_SPRG0
mfspr r5, SPRN_SPRG1
mfspr r6, SPRN_SPRG2
mfspr r7, SPRN_SPRG3
mfsdr1 r8
stw r4, SS_SPRG+0 (r3)
stw r5, SS_SPRG+4 (r3)
stw r6, SS_SPRG+8 (r3)
stw r7, SS_SPRG+12 (r3)
stw r8, SS_SDR1(r3)
mfspr r4, SPRN_SPRG4
mfspr r5, SPRN_SPRG5
mfspr r6, SPRN_SPRG6
mfspr r7, SPRN_SPRG7
stw r4, SS_SPRG+16 (r3)
stw r5, SS_SPRG+20 (r3)
stw r6, SS_SPRG+24 (r3)
stw r7, SS_SPRG+28 (r3)
mfspr r4, SPRN_DBAT0U
mfspr r5, SPRN_DBAT0L
mfspr r6, SPRN_DBAT1U
mfspr r7, SPRN_DBAT1L
stw r4, SS_DBAT+0 x00(r3)
stw r5, SS_DBAT+0 x04(r3)
stw r6, SS_DBAT+0 x08(r3)
stw r7, SS_DBAT+0 x0c(r3)
mfspr r4, SPRN_DBAT2U
mfspr r5, SPRN_DBAT2L
mfspr r6, SPRN_DBAT3U
mfspr r7, SPRN_DBAT3L
stw r4, SS_DBAT+0 x10(r3)
stw r5, SS_DBAT+0 x14(r3)
stw r6, SS_DBAT+0 x18(r3)
stw r7, SS_DBAT+0 x1c(r3)
mfspr r4, SPRN_DBAT4U
mfspr r5, SPRN_DBAT4L
mfspr r6, SPRN_DBAT5U
mfspr r7, SPRN_DBAT5L
stw r4, SS_DBAT+0 x20(r3)
stw r5, SS_DBAT+0 x24(r3)
stw r6, SS_DBAT+0 x28(r3)
stw r7, SS_DBAT+0 x2c(r3)
mfspr r4, SPRN_DBAT6U
mfspr r5, SPRN_DBAT6L
mfspr r6, SPRN_DBAT7U
mfspr r7, SPRN_DBAT7L
stw r4, SS_DBAT+0 x30(r3)
stw r5, SS_DBAT+0 x34(r3)
stw r6, SS_DBAT+0 x38(r3)
stw r7, SS_DBAT+0 x3c(r3)
mfspr r4, SPRN_IBAT0U
mfspr r5, SPRN_IBAT0L
mfspr r6, SPRN_IBAT1U
mfspr r7, SPRN_IBAT1L
stw r4, SS_IBAT+0 x00(r3)
stw r5, SS_IBAT+0 x04(r3)
stw r6, SS_IBAT+0 x08(r3)
stw r7, SS_IBAT+0 x0c(r3)
mfspr r4, SPRN_IBAT2U
mfspr r5, SPRN_IBAT2L
mfspr r6, SPRN_IBAT3U
mfspr r7, SPRN_IBAT3L
stw r4, SS_IBAT+0 x10(r3)
stw r5, SS_IBAT+0 x14(r3)
stw r6, SS_IBAT+0 x18(r3)
stw r7, SS_IBAT+0 x1c(r3)
mfspr r4, SPRN_IBAT4U
mfspr r5, SPRN_IBAT4L
mfspr r6, SPRN_IBAT5U
mfspr r7, SPRN_IBAT5L
stw r4, SS_IBAT+0 x20(r3)
stw r5, SS_IBAT+0 x24(r3)
stw r6, SS_IBAT+0 x28(r3)
stw r7, SS_IBAT+0 x2c(r3)
mfspr r4, SPRN_IBAT6U
mfspr r5, SPRN_IBAT6L
mfspr r6, SPRN_IBAT7U
mfspr r7, SPRN_IBAT7L
stw r4, SS_IBAT+0 x30(r3)
stw r5, SS_IBAT+0 x34(r3)
stw r6, SS_IBAT+0 x38(r3)
stw r7, SS_IBAT+0 x3c(r3)
mfmsr r4
mflr r5
mfcr r6
stw r4, SS_MSR(r3)
stw r5, SS_LR(r3)
stw r6, SS_CR(r3)
stw r1, SS_SP(r3)
stw r2, SS_R2(r3)
1 : mftbu r4
mftb r5
mftbu r6
cmpw r4, r6
bne 1 b
stw r4, SS_TB+0 (r3)
stw r5, SS_TB+4 (r3)
stmw r12, SS_GPREG(r3)
li r4, 0
addi r6, r3, SS_SR-4
1 : mfsrin r5, r4
stwu r5, 4 (r6)
addis r4, r4, 0 x1000
cmpwi r4, 0
bne 1 b
/* Disable machine checks and critical exceptions */
mfmsr r4
rlwinm r4, r4, 0 , ~MSR_CE
rlwinm r4, r4, 0 , ~MSR_ME
mtmsr r4
isync
#define TMP_VIRT_IMMR 0 xf0000000
#define DEFAULT_IMMR_VALUE 0 xff400000
#define IMMRBAR_BASE 0 x0000
lis r4, immrbase@ha
lwz r4, immrbase@l(r4)
/* Use DBAT0 to address the current IMMR space */
ori r4, r4, 0 x002a
mtspr SPRN_DBAT0L, r4
lis r8, TMP_VIRT_IMMR@h
ori r4, r8, 0 x001e /* 1 MByte accessible from Kernel Space only */
mtspr SPRN_DBAT0U, r4
isync
/* Use DBAT1 to address the original IMMR space */
lis r4, DEFAULT_IMMR_VALUE@h
ori r4, r4, 0 x002a
mtspr SPRN_DBAT1L, r4
lis r9, (TMP_VIRT_IMMR + 0 x01000000)@h
ori r4, r9, 0 x001e /* 1 MByte accessible from Kernel Space only */
mtspr SPRN_DBAT1U, r4
isync
/* Use DBAT2 to address the beginning of RAM. This isn't done
* using the normal virtual mapping , because with page debugging
* enabled it will be read - only .
*/
li r4, 0 x0002
mtspr SPRN_DBAT2L, r4
lis r4, KERNELBASE@h
ori r4, r4, 0 x001e /* 1 MByte accessible from Kernel Space only */
mtspr SPRN_DBAT2U, r4
isync
/* Flush the cache with our BAT, as there will be TLB misses
* otherwise if page debugging is enabled , and these misses
* will disturb the PLRU algorithm .
*/
bl __flush_disable_L1
/* Keep the i-cache enabled, so the hack below for low-boot
* flash will work .
*/
mfspr r3, SPRN_HID0
ori r3, r3, HID0_ICE
mtspr SPRN_HID0, r3
isync
lis r6, 0 xf515
ori r6, r6, 0 x3ae5
lis r7, mpc83xx_deep_resume@h
ori r7, r7, mpc83xx_deep_resume@l
tophys(r7, r7)
lis r5, KERNELBASE@h
stw r6, 0 (r5)
stw r7, 4 (r5)
/* Reset BARs */
li r4, 0
stw r4, 0 x0024(r8)
stw r4, 0 x002c(r8)
stw r4, 0 x0034(r8)
stw r4, 0 x003c(r8)
stw r4, 0 x0064(r8)
stw r4, 0 x006c(r8)
/* Rev 1 of the 8313 has problems with wakeup events that are
* pending during the transition to deep sleep state ( such as if
* the PCI host sets the state to D3 and then D0 in rapid
* succession ) . This check shrinks the race window somewhat .
*
* See erratum PCI23 , though the problem is not limited
* to PCI .
*/
lwz r3, 0 x0b04(r8)
andi. r3, r3, 1
bne- mpc83xx_deep_resume
/* Move IMMR back to the default location, following the
* procedure specified in the MPC8313 manual .
*/
lwz r4, IMMRBAR_BASE(r8)
isync
lis r4, DEFAULT_IMMR_VALUE@h
stw r4, IMMRBAR_BASE(r8)
lis r4, KERNELBASE@h
lwz r4, 0 (r4)
isync
lwz r4, IMMRBAR_BASE(r9)
mr r8, r9
isync
/* Check the Reset Configuration Word to see whether flash needs
* to be mapped at a low address or a high address .
*/
lwz r4, 0 x0904(r8)
andis. r4, r4, 0 x0400
li r4, 0
beq boot_low
lis r4, 0 xff80
boot_low:
stw r4, 0 x0020(r8)
lis r7, 0 x8000
ori r7, r7, 0 x0016
mfspr r5, SPRN_HID0
rlwinm r5, r5, 0 , ~(HID0_DOZE | HID0_NAP)
oris r5, r5, HID0_SLEEP@h
mtspr SPRN_HID0, r5
isync
mfmsr r5
oris r5, r5, MSR_POW@h
/* Enable the flash mapping at the appropriate address. This
* mapping will override the RAM mapping if booting low , so there ' s
* no need to disable the latter . This must be done inside the same
* cache line as setting MSR_POW , so that no instruction fetches
* from RAM happen after the flash mapping is turned on .
*/
.align 5
stw r7, 0 x0024(r8)
sync
isync
mtmsr r5
isync
1 : b 1 b
mpc83xx_deep_resume:
lis r4, 1 f@h
ori r4, r4, 1 f@l
tophys(r4, r4)
mtsrr0 r4
mfmsr r4
rlwinm r4, r4, 0 , ~(MSR_IR | MSR_DR)
mtsrr1 r4
rfi
1 : tlbia
bl __inval_enable_L1
lis r3, mpc83xx_sleep_save_area@h
ori r3, r3, mpc83xx_sleep_save_area@l
tophys(r3, r3)
lwz r5, SS_MEMSAVE+0 (r3)
lwz r6, SS_MEMSAVE+4 (r3)
stw r5, 0 (0 )
stw r6, 4 (0 )
lwz r5, SS_HID+0 (r3)
lwz r6, SS_HID+4 (r3)
lwz r7, SS_HID+8 (r3)
mtspr SPRN_HID0, r5
mtspr SPRN_HID1, r6
/* FIXME: Should this use SPRN_HID2_G2_LE? */
mtspr SPRN_HID2_750FX, r7
lwz r4, SS_IABR+0 (r3)
lwz r5, SS_IABR+4 (r3)
lwz r6, SS_IBCR(r3)
lwz r7, SS_DABR+0 (r3)
lwz r8, SS_DABR+4 (r3)
lwz r9, SS_DBCR(r3)
mtspr SPRN_IABR, r4
mtspr SPRN_IABR2, r5
mtspr SPRN_IBCR, r6
mtspr SPRN_DABR, r7
mtspr SPRN_DABR2, r8
mtspr SPRN_DBCR, r9
li r4, 0
addi r6, r3, SS_SR-4
1 : lwzu r5, 4 (r6)
mtsrin r5, r4
addis r4, r4, 0 x1000
cmpwi r4, 0
bne 1 b
lwz r4, SS_DBAT+0 x00(r3)
lwz r5, SS_DBAT+0 x04(r3)
lwz r6, SS_DBAT+0 x08(r3)
lwz r7, SS_DBAT+0 x0c(r3)
mtspr SPRN_DBAT0U, r4
mtspr SPRN_DBAT0L, r5
mtspr SPRN_DBAT1U, r6
mtspr SPRN_DBAT1L, r7
lwz r4, SS_DBAT+0 x10(r3)
lwz r5, SS_DBAT+0 x14(r3)
lwz r6, SS_DBAT+0 x18(r3)
lwz r7, SS_DBAT+0 x1c(r3)
mtspr SPRN_DBAT2U, r4
mtspr SPRN_DBAT2L, r5
mtspr SPRN_DBAT3U, r6
mtspr SPRN_DBAT3L, r7
lwz r4, SS_DBAT+0 x20(r3)
lwz r5, SS_DBAT+0 x24(r3)
lwz r6, SS_DBAT+0 x28(r3)
lwz r7, SS_DBAT+0 x2c(r3)
mtspr SPRN_DBAT4U, r4
mtspr SPRN_DBAT4L, r5
mtspr SPRN_DBAT5U, r6
mtspr SPRN_DBAT5L, r7
lwz r4, SS_DBAT+0 x30(r3)
lwz r5, SS_DBAT+0 x34(r3)
lwz r6, SS_DBAT+0 x38(r3)
lwz r7, SS_DBAT+0 x3c(r3)
mtspr SPRN_DBAT6U, r4
mtspr SPRN_DBAT6L, r5
mtspr SPRN_DBAT7U, r6
mtspr SPRN_DBAT7L, r7
lwz r4, SS_IBAT+0 x00(r3)
lwz r5, SS_IBAT+0 x04(r3)
lwz r6, SS_IBAT+0 x08(r3)
lwz r7, SS_IBAT+0 x0c(r3)
mtspr SPRN_IBAT0U, r4
mtspr SPRN_IBAT0L, r5
mtspr SPRN_IBAT1U, r6
mtspr SPRN_IBAT1L, r7
lwz r4, SS_IBAT+0 x10(r3)
lwz r5, SS_IBAT+0 x14(r3)
lwz r6, SS_IBAT+0 x18(r3)
lwz r7, SS_IBAT+0 x1c(r3)
mtspr SPRN_IBAT2U, r4
mtspr SPRN_IBAT2L, r5
mtspr SPRN_IBAT3U, r6
mtspr SPRN_IBAT3L, r7
lwz r4, SS_IBAT+0 x20(r3)
lwz r5, SS_IBAT+0 x24(r3)
lwz r6, SS_IBAT+0 x28(r3)
lwz r7, SS_IBAT+0 x2c(r3)
mtspr SPRN_IBAT4U, r4
mtspr SPRN_IBAT4L, r5
mtspr SPRN_IBAT5U, r6
mtspr SPRN_IBAT5L, r7
lwz r4, SS_IBAT+0 x30(r3)
lwz r5, SS_IBAT+0 x34(r3)
lwz r6, SS_IBAT+0 x38(r3)
lwz r7, SS_IBAT+0 x3c(r3)
mtspr SPRN_IBAT6U, r4
mtspr SPRN_IBAT6L, r5
mtspr SPRN_IBAT7U, r6
mtspr SPRN_IBAT7L, r7
lwz r4, SS_SPRG+16 (r3)
lwz r5, SS_SPRG+20 (r3)
lwz r6, SS_SPRG+24 (r3)
lwz r7, SS_SPRG+28 (r3)
mtspr SPRN_SPRG4, r4
mtspr SPRN_SPRG5, r5
mtspr SPRN_SPRG6, r6
mtspr SPRN_SPRG7, r7
lwz r4, SS_SPRG+0 (r3)
lwz r5, SS_SPRG+4 (r3)
lwz r6, SS_SPRG+8 (r3)
lwz r7, SS_SPRG+12 (r3)
lwz r8, SS_SDR1(r3)
mtspr SPRN_SPRG0, r4
mtspr SPRN_SPRG1, r5
mtspr SPRN_SPRG2, r6
mtspr SPRN_SPRG3, r7
mtsdr1 r8
lwz r4, SS_MSR(r3)
lwz r5, SS_LR(r3)
lwz r6, SS_CR(r3)
lwz r1, SS_SP(r3)
lwz r2, SS_R2(r3)
mtsrr1 r4
mtsrr0 r5
mtcr r6
li r4, 0
mtspr SPRN_TBWL, r4
lwz r4, SS_TB+0 (r3)
lwz r5, SS_TB+4 (r3)
mtspr SPRN_TBWU, r4
mtspr SPRN_TBWL, r5
lmw r12, SS_GPREG(r3)
/* Kick decrementer */
li r0, 1
mtdec r0
rfi
_ASM_NOKPROBE_SYMBOL(mpc83xx_deep_resume)
Messung V0.5 in Prozent C=95 H=100 G=97
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet am 2026-10-02)
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