diff options
Diffstat (limited to 'cpu/mpc85xx/start.S')
| -rw-r--r-- | cpu/mpc85xx/start.S | 131 |
1 files changed, 63 insertions, 68 deletions
diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S index 2044722..e8e5eb2 100644 --- a/cpu/mpc85xx/start.S +++ b/cpu/mpc85xx/start.S @@ -143,68 +143,8 @@ _start_e500: li r1,0x0f00 mtspr IVOR15,r1 /* 15: Debug */ - - /* - * After reset, CCSRBAR is located at CFG_CCSRBAR_DEFAULT, i.e. - * 0xff700000-0xff800000. We need add a TLB1 entry for this 1MB - * region before we can access any CCSR registers such as L2 - * registers, Local Access Registers,etc. We will also re-allocate - * CFG_CCSRBAR_DEFAULT to CFG_CCSRBAR immediately after TLB1 setup. - * - * Please refer to board-specif directory for TLB1 entry configuration. - * (e.g. board/<yourboard>/init.S) - * - */ - bl tlb1_entry - mr r5,r0 - lwzu r4,0(r5) /* how many TLB1 entries we actually use */ - mtctr r4 - -0: lwzu r6,4(r5) - lwzu r7,4(r5) - lwzu r8,4(r5) - lwzu r9,4(r5) - mtspr MAS0,r6 - mtspr MAS1,r7 - mtspr MAS2,r8 - mtspr MAS3,r9 - isync - msync - tlbwe - isync - bdnz 0b - -1: -#if (CFG_CCSRBAR_DEFAULT != CFG_CCSRBAR) - /* Special sequence needed to update CCSRBAR itself */ - lis r4,CFG_CCSRBAR_DEFAULT@h - ori r4,r4,CFG_CCSRBAR_DEFAULT@l - - lis r5,CFG_CCSRBAR@h - ori r5,r5,CFG_CCSRBAR@l - srwi r6,r5,12 - stw r6,0(r4) - isync - - lis r5,0xffff - ori r5,r5,0xf000 - lwz r5,0(r5) - isync - - lis r3,CFG_CCSRBAR@h - lwz r5,CFG_CCSRBAR@l(r3) - isync -#endif - - - /* set up local access windows, defined at board/<boardname>/init.S */ - lis r7,CFG_CCSRBAR@h - ori r7,r7,CFG_CCSRBAR@l - /* Clear and set up some registers. */ - li r0,0 - mtmsr r0 - li r0,0x0000 + li r0,0x0000 lis r1,0xffff mtspr DEC,r0 /* prevent dec exceptions */ mttbl r0 /* prevent fit & wdt exceptions */ @@ -214,18 +154,13 @@ _start_e500: mtspr ESR,r0 /* clear exception syndrome register */ mtspr MCSR,r0 /* machine check syndrome register */ mtxer r0 /* clear integer exception register */ - lis r1,0x0002 /* set CE bit (Critical Exceptions) */ - ori r1,r1,0x1200 /* set ME/DE bit */ - mtmsr r1 /* change MSR */ - isync /* Enable Time Base and Select Time Base Clock */ lis r0,HID0_EMCP@h /* Enable machine check */ #if defined(CONFIG_ENABLE_36BIT_PHYS) - ori r0,r0,(HID0_TBEN|HID0_ENMAS7)@l /* Enable Timebase & MAS7 */ -#else - ori r0,r0,HID0_TBEN@l /* enable Timebase */ + ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */ #endif + ori r0,r0,HID0_TBEN@l /* Enable Timebase */ mtspr HID0,r0 li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */ @@ -246,6 +181,58 @@ _start_e500: mtspr DBCR0,r0 #endif + /* create a temp mapping in AS=1 to the boot window */ + lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h + ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l + + lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16M)@h + ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16M)@l + + lis r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@h + ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@l + + lis r9,FSL_BOOKE_MAS3(0xff800000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h + ori r9,r9,FSL_BOOKE_MAS3(0xff800000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l + + mtspr MAS0,r6 + mtspr MAS1,r7 + mtspr MAS2,r8 + mtspr MAS3,r9 + isync + msync + tlbwe + + /* create a temp mapping in AS=1 to the stack */ + lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h + ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l + + lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h + ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l + + lis r8,FSL_BOOKE_MAS2(CFG_INIT_RAM_ADDR, 0)@h + ori r8,r8,FSL_BOOKE_MAS2(CFG_INIT_RAM_ADDR, 0)@l + + lis r9,FSL_BOOKE_MAS3(CFG_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h + ori r9,r9,FSL_BOOKE_MAS3(CFG_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l + + mtspr MAS0,r6 + mtspr MAS1,r7 + mtspr MAS2,r8 + mtspr MAS3,r9 + isync + msync + tlbwe + + lis r6,MSR_CE|MSR_ME|MSR_DE|MSR_IS|MSR_DS@h + ori r6,r6,MSR_CE|MSR_ME|MSR_DE|MSR_IS|MSR_DS@l + lis r7,switch_as@h + ori r7,r7,switch_as@l + + mtspr SPRN_SRR0,r7 + mtspr SPRN_SRR1,r6 + rfi + +switch_as: /* L1 DCache is used for initial RAM */ /* Allocate Initial RAM in data cache. @@ -305,6 +292,14 @@ _start_cont: stw r0,+12(r1) /* Save return addr (underflow vect) */ GET_GOT + bl cpu_init_early_f + + /* switch back to AS = 0 */ + lis r3,(MSR_CE|MSR_ME|MSR_DE)@h + ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l + mtmsr r3 + isync + bl cpu_init_f bl board_init_f isync |