mirror of
https://github.com/smaeul/u-boot.git
synced 2025-10-31 20:18:18 +00:00
236 lines
4.4 KiB
ArmAsm
236 lines
4.4 KiB
ArmAsm
#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
|