| #include <config.h> |
| #include <74xx_7xx.h> |
| #include "version.h" |
| |
| #include <ppc_asm.tmpl> |
| #include <ppc_defs.h> |
| |
| #include <asm/cache.h> |
| #include <asm/mmu.h> |
| |
| #include "../include/mv_gen_reg.h" |
| |
| #ifdef CONFIG_ECC |
| /* Galileo specific asm code for initializing ECC */ |
| .globl board_relocate_rom |
| board_relocate_rom: |
| mflr r7 |
| /* update the location of the GT registers */ |
| lis r11, CONFIG_SYS_GT_REGS@h |
| /* if we're using ECC, we must use the DMA engine to copy ourselves */ |
| bl start_idma_transfer_0 |
| bl wait_for_idma_0 |
| bl stop_idma_engine_0 |
| |
| mtlr r7 |
| blr |
| |
| .globl board_init_ecc |
| board_init_ecc: |
| mflr r7 |
| /* NOTE: r10 still contains the location we've been relocated to |
| * which happens to be TOP_OF_RAM - CONFIG_SYS_MONITOR_LEN */ |
| |
| /* now that we're running from ram, init the rest of main memory |
| * for ECC use */ |
| lis r8, CONFIG_SYS_MONITOR_LEN@h |
| ori r8, r8, CONFIG_SYS_MONITOR_LEN@l |
| |
| divw r3, r10, r8 |
| |
| /* set up the counter, and init the starting address */ |
| mtctr r3 |
| li r12, 0 |
| |
| /* bytes per transfer */ |
| mr r5, r8 |
| about_to_init_ecc: |
| 1: mr r3, r12 |
| mr r4, r12 |
| bl start_idma_transfer_0 |
| bl wait_for_idma_0 |
| bl stop_idma_engine_0 |
| add r12, r12, r8 |
| bdnz 1b |
| |
| mtlr r7 |
| blr |
| |
| /* r3: dest addr |
| * r4: source addr |
| * r5: byte count |
| * r11: gt regbase |
| * trashes: r6, r5 |
| */ |
| start_idma_transfer_0: |
| /* set the byte count, including the OWN bit */ |
| mr r6, r11 |
| ori r6, r6, CHANNEL0_DMA_BYTE_COUNT |
| stwbrx r5, 0, (r6) |
| |
| /* set the source address */ |
| mr r6, r11 |
| ori r6, r6, CHANNEL0_DMA_SOURCE_ADDRESS |
| stwbrx r4, 0, (r6) |
| |
| /* set the dest address */ |
| mr r6, r11 |
| ori r6, r6, CHANNEL0_DMA_DESTINATION_ADDRESS |
| stwbrx r3, 0, (r6) |
| |
| /* set the next record pointer */ |
| li r5, 0 |
| mr r6, r11 |
| ori r6, r6, CHANNEL0NEXT_RECORD_POINTER |
| stwbrx r5, 0, (r6) |
| |
| /* set the low control register */ |
| /* bit 9 is NON chained mode, bit 31 is new style descriptors. |
| bit 12 is channel enable */ |
| ori r5, r5, (1 << 12) | (1 << 12) | (1 << 11) |
| /* 15 shifted by 16 (oris) == bit 31 */ |
| oris r5, r5, (1 << 15) |
| mr r6, r11 |
| ori r6, r6, CHANNEL0CONTROL |
| stwbrx r5, 0, (r6) |
| |
| blr |
| |
| /* this waits for the bytecount to return to zero, indicating |
| * that the trasfer is complete */ |
| wait_for_idma_0: |
| mr r5, r11 |
| lis r6, 0xff |
| ori r6, r6, 0xffff |
| ori r5, r5, CHANNEL0_DMA_BYTE_COUNT |
| 1: lwbrx r4, 0, (r5) |
| and. r4, r4, r6 |
| bne 1b |
| |
| blr |
| |
| /* this turns off channel 0 of the idma engine */ |
| stop_idma_engine_0: |
| /* shut off the DMA engine */ |
| li r5, 0 |
| mr r6, r11 |
| ori r6, r6, CHANNEL0CONTROL |
| stwbrx r5, 0, (r6) |
| |
| blr |
| #endif |
| |
| #ifdef CONFIG_SYS_BOARD_ASM_INIT |
| /* NOTE: trashes r3-r7 */ |
| .globl board_asm_init |
| board_asm_init: |
| /* just move the GT registers to where they belong */ |
| lis r3, CONFIG_SYS_DFL_GT_REGS@h |
| ori r3, r3, CONFIG_SYS_DFL_GT_REGS@l |
| lis r4, CONFIG_SYS_GT_REGS@h |
| ori r4, r4, CONFIG_SYS_GT_REGS@l |
| li r5, INTERNAL_SPACE_DECODE |
| |
| /* test to see if we've already moved */ |
| lwbrx r6, r5, r4 |
| andi. r6, r6, 0xffff |
| /* check loading of R7 is: 0x0F80 should: 0xf800: DONE */ |
| /* rlwinm r7, r4, 8, 16, 31 |
| rlwinm r7, r4, 12, 16, 31 */ /* original */ |
| rlwinm r7, r4, 16, 16, 31 |
| /* -----------------------------------------------------*/ |
| cmp cr0, r7, r6 |
| beqlr |
| |
| /* nope, have to move the registers */ |
| lwbrx r6, r5, r3 |
| andis. r6, r6, 0xffff |
| or r6, r6, r7 |
| stwbrx r6, r5, r3 |
| |
| /* now, poll for the change */ |
| 1: lwbrx r7, r5, r4 |
| cmp cr0, r7, r6 |
| bne 1b |
| |
| /* done! */ |
| blr |
| #endif |
| |
| /* For use of the debug LEDs */ |
| .global led_on0_relocated |
| led_on0_relocated: |
| xor r21, r21, r21 |
| xor r18, r18, r18 |
| lis r18, 0xFC80 |
| ori r18, r18, 0x8000 |
| stw r21, 0x0(r18) |
| /* stw r18, 0x0(r18) */ |
| sync |
| blr |
| |
| .global led_off0_relocated |
| led_off0_relocated: |
| xor r21, r21, r21 |
| xor r18, r18, r18 |
| lis r18, 0xFC81 |
| ori r18, r18, 0x4000 |
| stw r21, 0x0(r18) |
| /* stw r18, 0x0(r18) */ |
| sync |
| blr |
| |
| .global led_on0 |
| led_on0: |
| xor r18, r18, r18 |
| lis r18, 0x1c80 |
| ori r18, r18, 0x8000 |
| stw r18, 0x0(r18) |
| sync |
| blr |
| |
| .global led_off0 |
| led_off0: |
| xor r18, r18, r18 |
| lis r18, 0x1c81 |
| ori r18, r18, 0x4000 |
| stw r18, 0x0(r18) |
| sync |
| blr |
| |
| .global led_on1 |
| led_on1: |
| xor r18, r18, r18 |
| lis r18, 0x1c80 |
| ori r18, r18, 0xc000 |
| stw r18, 0x0(r18) |
| sync |
| blr |
| |
| .global led_off1 |
| led_off1: |
| xor r18, r18, r18 |
| lis r18, 0x1c81 |
| ori r18, r18, 0x8000 |
| stw r18, 0x0(r18) |
| sync |
| blr |
| |
| .global led_on2 |
| led_on2: |
| xor r18, r18, r18 |
| lis r18, 0x1c81 |
| ori r18, r18, 0x0000 |
| stw r18, 0x0(r18) |
| sync |
| blr |
| |
| .global led_off2 |
| led_off2: |
| xor r18, r18, r18 |
| lis r18, 0x1c81 |
| ori r18, r18, 0xc000 |
| stw r18, 0x0(r18) |
| sync |
| blr |
