| #include <config.h> |
| #include <mpc85xx.h> |
| #include <version.h> |
| |
| #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */ |
| |
| #include <ppc_asm.tmpl> |
| #include <ppc_defs.h> |
| |
| #include <asm/cache.h> |
| #include <asm/mmu.h> |
| |
| /* To boot secondary cpus, we need a place for them to start up. |
| * Normally, they start at 0xfffffffc, but that's usually the |
| * firmware, and we don't want to have to run the firmware again. |
| * Instead, the primary cpu will set the BPTR to point here to |
| * this page. We then set up the core, and head to |
| * start_secondary. Note that this means that the code below |
| * must never exceed 1023 instructions (the branch at the end |
| * would then be the 1024th). |
| */ |
| .globl __secondary_start_page |
| .align 12 |
| __secondary_start_page: |
| /* First do some preliminary setup */ |
| lis r3, HID0_EMCP@h /* enable machine check */ |
| #ifndef CONFIG_E500MC |
| ori r3,r3,HID0_TBEN@l /* enable Timebase */ |
| #endif |
| #ifdef CONFIG_PHYS_64BIT |
| ori r3,r3,HID0_ENMAS7@l /* enable MAS7 updates */ |
| #endif |
| mtspr SPRN_HID0,r3 |
| |
| #ifndef CONFIG_E500MC |
| li r3,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */ |
| mtspr SPRN_HID1,r3 |
| #endif |
| |
| /* Enable branch prediction */ |
| li r3,0x201 |
| mtspr SPRN_BUCSR,r3 |
| |
| /* Ensure TB is 0 */ |
| li r3,0 |
| mttbl r3 |
| mttbu r3 |
| |
| /* Enable/invalidate the I-Cache */ |
| mfspr r0,SPRN_L1CSR1 |
| ori r0,r0,(L1CSR1_ICFI|L1CSR1_ICE) |
| mtspr SPRN_L1CSR1,r0 |
| isync |
| |
| /* Enable/invalidate the D-Cache */ |
| mfspr r0,SPRN_L1CSR0 |
| ori r0,r0,(L1CSR0_DCFI|L1CSR0_DCE) |
| msync |
| isync |
| mtspr SPRN_L1CSR0,r0 |
| isync |
| |
| #define toreset(x) (x - __secondary_start_page + 0xfffff000) |
| |
| /* get our PIR to figure out our table entry */ |
| lis r3,toreset(__spin_table)@h |
| ori r3,r3,toreset(__spin_table)@l |
| |
| /* r10 has the base address for the entry */ |
| mfspr r0,SPRN_PIR |
| #ifdef CONFIG_E500MC |
| rlwinm r4,r0,27,27,31 |
| #else |
| mr r4,r0 |
| #endif |
| slwi r8,r4,5 |
| add r10,r3,r8 |
| |
| #define EPAPR_MAGIC (0x45504150) |
| #define ENTRY_ADDR_UPPER 0 |
| #define ENTRY_ADDR_LOWER 4 |
| #define ENTRY_R3_UPPER 8 |
| #define ENTRY_R3_LOWER 12 |
| #define ENTRY_RESV 16 |
| #define ENTRY_PIR 20 |
| #define ENTRY_R6_UPPER 24 |
| #define ENTRY_R6_LOWER 28 |
| #define ENTRY_SIZE 32 |
| |
| /* setup the entry */ |
| li r3,0 |
| li r8,1 |
| stw r0,ENTRY_PIR(r10) |
| stw r3,ENTRY_ADDR_UPPER(r10) |
| stw r8,ENTRY_ADDR_LOWER(r10) |
| stw r3,ENTRY_R3_UPPER(r10) |
| stw r4,ENTRY_R3_LOWER(r10) |
| stw r3,ENTRY_R6_UPPER(r10) |
| stw r3,ENTRY_R6_LOWER(r10) |
| |
| /* setup mapping for AS = 1, and jump there */ |
| lis r11,(MAS0_TLBSEL(1)|MAS0_ESEL(1))@h |
| mtspr SPRN_MAS0,r11 |
| lis r11,(MAS1_VALID|MAS1_IPROT)@h |
| ori r11,r11,(MAS1_TS|MAS1_TSIZE(BOOKE_PAGESZ_4K))@l |
| mtspr SPRN_MAS1,r11 |
| lis r11,(0xfffff000|MAS2_I)@h |
| ori r11,r11,(0xfffff000|MAS2_I)@l |
| mtspr SPRN_MAS2,r11 |
| lis r11,(0xfffff000|MAS3_SX|MAS3_SW|MAS3_SR)@h |
| ori r11,r11,(0xfffff000|MAS3_SX|MAS3_SW|MAS3_SR)@l |
| mtspr SPRN_MAS3,r11 |
| tlbwe |
| |
| bl 1f |
| 1: mflr r11 |
| addi r11,r11,28 |
| mfmsr r13 |
| ori r12,r13,MSR_IS|MSR_DS@l |
| |
| mtspr SPRN_SRR0,r11 |
| mtspr SPRN_SRR1,r12 |
| rfi |
| |
| /* spin waiting for addr */ |
| 2: |
| lwz r4,ENTRY_ADDR_LOWER(r10) |
| andi. r11,r4,1 |
| bne 2b |
| isync |
| |
| /* get the upper bits of the addr */ |
| lwz r11,ENTRY_ADDR_UPPER(r10) |
| |
| /* setup branch addr */ |
| mtspr SPRN_SRR0,r4 |
| |
| /* mark the entry as released */ |
| li r8,3 |
| stw r8,ENTRY_ADDR_LOWER(r10) |
| |
| /* mask by ~64M to setup our tlb we will jump to */ |
| rlwinm r12,r4,0,0,5 |
| |
| /* setup r3, r4, r5, r6, r7, r8, r9 */ |
| lwz r3,ENTRY_R3_LOWER(r10) |
| li r4,0 |
| li r5,0 |
| lwz r6,ENTRY_R6_LOWER(r10) |
| lis r7,(64*1024*1024)@h |
| li r8,0 |
| li r9,0 |
| |
| /* load up the pir */ |
| lwz r0,ENTRY_PIR(r10) |
| mtspr SPRN_PIR,r0 |
| mfspr r0,SPRN_PIR |
| stw r0,ENTRY_PIR(r10) |
| |
| /* |
| * Coming here, we know the cpu has one TLB mapping in TLB1[0] |
| * which maps 0xfffff000-0xffffffff one-to-one. We set up a |
| * second mapping that maps addr 1:1 for 64M, and then we jump to |
| * addr |
| */ |
| lis r10,(MAS0_TLBSEL(1)|MAS0_ESEL(0))@h |
| mtspr SPRN_MAS0,r10 |
| lis r10,(MAS1_VALID|MAS1_IPROT)@h |
| ori r10,r10,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l |
| mtspr SPRN_MAS1,r10 |
| /* WIMGE = 0b00000 for now */ |
| mtspr SPRN_MAS2,r12 |
| ori r12,r12,(MAS3_SX|MAS3_SW|MAS3_SR) |
| mtspr SPRN_MAS3,r12 |
| #ifdef CONFIG_ENABLE_36BIT_PHYS |
| mtspr SPRN_MAS7,r11 |
| #endif |
| tlbwe |
| |
| /* Now we have another mapping for this page, so we jump to that |
| * mapping |
| */ |
| mtspr SPRN_SRR1,r13 |
| rfi |
| |
| .align L1_CACHE_SHIFT |
| .globl __spin_table |
| __spin_table: |
| .space CONFIG_NUM_CPUS*ENTRY_SIZE |
| |
| /* Fill in the empty space. The actual reset vector is |
| * the last word of the page */ |
| __secondary_start_code_end: |
| .space 4092 - (__secondary_start_code_end - __secondary_start_page) |
| __secondary_reset_vector: |
| b __secondary_start_page |