/* * This assumes that all cores using __setup_cpu_603 with * MMU_FTR_USE_HIGH_BATS are G2_LE compatible
*/
BEGIN_MMU_FTR_SECTION
bl setup_g2_le_hid2
END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
/* Enable high BATs for G2_LE and derivatives like e300cX */
SYM_FUNC_START_LOCAL(setup_g2_le_hid2)
mfspr r11,SPRN_HID2_G2_LE
oris r11,r11,HID2_G2_LE_HBE@h
mtspr SPRN_HID2_G2_LE,r11
sync
isync
blr
SYM_FUNC_END(setup_g2_le_hid2)
/* 7400 <= rev 2.7 and 7410 rev = 1.0 suffer from some * erratas we work around here. * Moto MPC710CE.pdf describes them, those are errata * #3, #4 and #5 * Note that we assume the firmware didn't choose to * apply other workarounds (there are other ones documented * in the .pdf). It appear that Apple firmware only works * around #3 and with the same fix we use. We may want to * check if the CPU is using 60x bus mode in which case * the workaround for errata #4 is useless. Also, we may * want to explicitly clear HID0_NOPDST as this is not * needed once we have applied workaround #5 (though it's * not set by Apple's firmware at least).
*/
SYM_FUNC_START_LOCAL(setup_7400_workarounds)
mfpvr r3
rlwinm r3,r3,0,20,31
cmpwi 0,r3,0x0207
ble 1f
blr
SYM_FUNC_END(setup_7400_workarounds)
SYM_FUNC_START_LOCAL(setup_7410_workarounds)
mfpvr r3
rlwinm r3,r3,0,20,31
cmpwi 0,r3,0x0100
bnelr
1:
mfspr r11,SPRN_MSSSR0 /* Errata #3: Set L1OPQ_SIZE to 0x10 */
rlwinm r11,r11,0,9,6
oris r11,r11,0x0100 /* Errata #4: Set L2MQ_SIZE to 1 (check for MPX mode first ?) */
oris r11,r11,0x0002 /* Errata #5: Set DRLT_SIZE to 0x01 */
rlwinm r11,r11,0,5,2
oris r11,r11,0x0800
sync
mtspr SPRN_MSSSR0,r11
sync
isync
blr
SYM_FUNC_END(setup_7410_workarounds)
/* 740/750/7400/7410 * Enable Store Gathering (SGE), Address Broadcast (ABE), * Branch History Table (BHTE), Branch Target ICache (BTIC) * Dynamic Power Management (DPM), Speculative (SPD) * Clear Instruction cache throttling (ICTC)
*/
SYM_FUNC_START_LOCAL(setup_750_7400_hid0)
mfspr r11,SPRN_HID0
ori r11,r11,HID0_SGE | HID0_ABE | HID0_BHTE | HID0_BTIC
oris r11,r11,HID0_DPM@h
BEGIN_FTR_SECTION
xori r11,r11,HID0_BTIC
END_FTR_SECTION_IFSET(CPU_FTR_NO_BTIC)
BEGIN_FTR_SECTION
xoris r11,r11,HID0_DPM@h /* disable dynamic power mgmt */
END_FTR_SECTION_IFSET(CPU_FTR_NO_DPM)
li r3,HID0_SPD
andc r11,r11,r3 /* clear SPD: enable speculative */
li r3,0
mtspr SPRN_ICTC,r3 /* Instruction Cache Throttling off */
isync
mtspr SPRN_HID0,r11
sync
isync
blr
SYM_FUNC_END(setup_750_7400_hid0)
/* 750cx specific * Looks like we have to disable NAP feature for some PLL settings... * (waiting for confirmation)
*/
SYM_FUNC_START_LOCAL(setup_750cx)
mfspr r10, SPRN_HID1
rlwinm r10,r10,4,28,31
cmpwi cr0,r10,7
cmpwi cr1,r10,9
cmpwi cr2,r10,11
cror 4*cr0+eq,4*cr0+eq,4*cr1+eq
cror 4*cr0+eq,4*cr0+eq,4*cr2+eq
bnelr
lwz r6,CPU_SPEC_FEATURES(r4)
li r7,CPU_FTR_CAN_NAP
andc r6,r6,r7
stw r6,CPU_SPEC_FEATURES(r4)
blr
SYM_FUNC_END(setup_750cx)
/* 750fx specific
*/
SYM_FUNC_START_LOCAL(setup_750fx)
blr
SYM_FUNC_END(setup_750fx)
/* MPC 745x * Enable Store Gathering (SGE), Branch Folding (FOLD) * Branch History Table (BHTE), Branch Target ICache (BTIC) * Dynamic Power Management (DPM), Speculative (SPD) * Ensure our data cache instructions really operate. * Timebase has to be running or we wouldn't have made it here, * just ensure we don't disable it. * Clear Instruction cache throttling (ICTC) * Enable L2 HW prefetch
*/
SYM_FUNC_START_LOCAL(setup_745x_specifics) /* We check for the presence of an L3 cache setup by * the firmware. If any, we disable NAP capability as * it's known to be bogus on rev 2.1 and earlier
*/
BEGIN_FTR_SECTION
mfspr r11,SPRN_L3CR
andis. r11,r11,L3CR_L3E@h
beq 1f
END_FTR_SECTION_IFSET(CPU_FTR_L3CR)
lwz r6,CPU_SPEC_FEATURES(r4)
andis. r0,r6,CPU_FTR_L3_DISABLE_NAP@h
beq 1f
li r7,CPU_FTR_CAN_NAP
andc r6,r6,r7
stw r6,CPU_SPEC_FEATURES(r4)
1:
mfspr r11,SPRN_HID0
/* All of the bits we have to set.....
*/
ori r11,r11,HID0_SGE | HID0_FOLD | HID0_BHTE
ori r11,r11,HID0_LRSTK | HID0_BTIC
oris r11,r11,HID0_DPM@h
BEGIN_MMU_FTR_SECTION
oris r11,r11,HID0_HIGH_BAT@h
END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
BEGIN_FTR_SECTION
xori r11,r11,HID0_BTIC
END_FTR_SECTION_IFSET(CPU_FTR_NO_BTIC)
BEGIN_FTR_SECTION
xoris r11,r11,HID0_DPM@h /* disable dynamic power mgmt */
END_FTR_SECTION_IFSET(CPU_FTR_NO_DPM)
/* All of the bits we have to clear....
*/
li r3,HID0_SPD | HID0_NOPDST | HID0_NOPTI
andc r11,r11,r3 /* clear SPD: enable speculative */
li r3,0
/* Enable L2 HW prefetch, if L2 is enabled
*/
mfspr r3,SPRN_L2CR
andis. r3,r3,L2CR_L2E@h
beqlr
mfspr r3,SPRN_MSSCR0
ori r3,r3,3
sync
mtspr SPRN_MSSCR0,r3
sync
isync
blr
SYM_FUNC_END(setup_745x_specifics)
/* * Initialize the FPU registers. This is needed to work around an errata * in some 750 cpus where using a not yet initialized FPU register after * power on reset may hang the CPU
*/
_GLOBAL(__init_fpu_registers)
mfmsr r10
ori r11,r10,MSR_FP
mtmsr r11
isync
addis r9,r3,empty_zero_page@ha
addi r9,r9,empty_zero_page@l
REST_32FPRS(0,r9)
sync
mtmsr r10
isync
blr
_ASM_NOKPROBE_SYMBOL(__init_fpu_registers)
/* Definitions for the table use to save CPU states */
#define CS_HID0 0
#define CS_HID1 4
#define CS_HID2 8
#define CS_MSSCR0 12
#define CS_MSSSR0 16
#define CS_ICTRL 20
#define CS_LDSTCR 24
#define CS_LDSTDB 28
#define CS_SIZE 32
/* Called in normal context to backup CPU 0 state. This * does not include cache settings. This function is also * called for machine sleep. This does not include the MMU * setup, BATs, etc... but rather the "special" registers * like HID0, HID1, MSSCR0, etc...
*/
_GLOBAL(__save_cpu_setup) /* Some CR fields are volatile, we back it up all */
mfcr r7
/* Get storage ptr */
lis r5,cpu_state_storage@h
ori r5,r5,cpu_state_storage@l
/* Save HID0 (common to all CONFIG_PPC_BOOK3S_32 cpus) */
mfspr r3,SPRN_HID0
stw r3,CS_HID0(r5)
/* Called with no MMU context (typically MSR:IR/DR off) to * restore CPU state as backed up by the previous * function. This does not include cache setting
*/
_GLOBAL(__restore_cpu_setup) /* Some CR fields are volatile, we back it up all */
mfcr r7
/* Get storage ptr */
lis r5,(cpu_state_storage-KERNELBASE)@h
ori r5,r5,cpu_state_storage@l
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