mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 23:33:00 +00:00
162 lines
3.4 KiB
ArmAsm
162 lines
3.4 KiB
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2020 MediaTek Inc.
|
||
|
|
*
|
||
|
|
* Author: Weijie Gao <weijie.gao@mediatek.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <config.h>
|
||
|
|
#include <asm-offsets.h>
|
||
|
|
#include <asm/cacheops.h>
|
||
|
|
#include <asm/regdef.h>
|
||
|
|
#include <asm/mipsregs.h>
|
||
|
|
#include <asm/addrspace.h>
|
||
|
|
#include <asm/asm.h>
|
||
|
|
#include "mt7628.h"
|
||
|
|
|
||
|
|
/* Set temporary stack address range */
|
||
|
|
#ifndef CONFIG_SYS_INIT_SP_ADDR
|
||
|
|
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
|
||
|
|
CONFIG_SYS_INIT_SP_OFFSET)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define CACHE_STACK_SIZE 0x4000
|
||
|
|
#define CACHE_STACK_BASE (CONFIG_SYS_INIT_SP_ADDR - CACHE_STACK_SIZE)
|
||
|
|
|
||
|
|
#define DELAY_USEC(us) ((58 * (us)) / 3)
|
||
|
|
|
||
|
|
.set noreorder
|
||
|
|
|
||
|
|
LEAF(mips_sram_init)
|
||
|
|
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
|
||
|
|
/* Setup CPU PLL */
|
||
|
|
li t0, DELAY_USEC(1000000)
|
||
|
|
li t1, KSEG1ADDR(SYSCTL_BASE + SYSCTL_ROM_STATUS_REG)
|
||
|
|
li t2, KSEG1ADDR(SYSCTL_BASE + SYSCTL_CLKCFG0_REG)
|
||
|
|
|
||
|
|
_check_rom_status:
|
||
|
|
lw t3, 0(t1)
|
||
|
|
andi t3, t3, 1
|
||
|
|
bnez t3, _rom_normal
|
||
|
|
subu t0, t0, 1
|
||
|
|
bnez t0, _check_rom_status
|
||
|
|
nop
|
||
|
|
|
||
|
|
lw t3, 0(t2)
|
||
|
|
ori t3, (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL)
|
||
|
|
xori t3, CPU_PLL_FROM_BBP
|
||
|
|
b _cpu_pll_done
|
||
|
|
nop
|
||
|
|
|
||
|
|
_rom_normal:
|
||
|
|
lw t3, 0(t2)
|
||
|
|
ori t3, (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL | \
|
||
|
|
DIS_BBP_SLEEP | EN_BBP_CLK)
|
||
|
|
xori t3, (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL)
|
||
|
|
|
||
|
|
_cpu_pll_done:
|
||
|
|
sw t3, 0(t2)
|
||
|
|
|
||
|
|
li t2, KSEG1ADDR(RBUSCTL_BASE + RBUSCTL_DYN_CFG0_REG)
|
||
|
|
lw t3, 0(t2)
|
||
|
|
ori t3, t3, (CPU_FDIV_M | CPU_FFRAC_M)
|
||
|
|
xori t3, t3, (CPU_FDIV_M | CPU_FFRAC_M)
|
||
|
|
ori t3, t3, ((1 << CPU_FDIV_S) | (1 << CPU_FFRAC_S))
|
||
|
|
sw t3, 0(t2)
|
||
|
|
|
||
|
|
/* Clear WST & SPR bits in ErrCtl */
|
||
|
|
mfc0 t0, CP0_ECC
|
||
|
|
ins t0, zero, 30, 2
|
||
|
|
mtc0 t0, CP0_ECC
|
||
|
|
ehb
|
||
|
|
|
||
|
|
/* Simply initialize I-Cache */
|
||
|
|
li a0, 0
|
||
|
|
li a1, CONFIG_SYS_ICACHE_SIZE
|
||
|
|
|
||
|
|
mtc0 zero, CP0_TAGLO /* Zero to DDataLo */
|
||
|
|
|
||
|
|
1: cache INDEX_STORE_TAG_I, 0(a0)
|
||
|
|
addiu a0, CONFIG_SYS_ICACHE_LINE_SIZE
|
||
|
|
bne a0, a1, 1b
|
||
|
|
nop
|
||
|
|
|
||
|
|
/* Simply initialize D-Cache */
|
||
|
|
li a0, 0
|
||
|
|
li a1, CONFIG_SYS_DCACHE_SIZE
|
||
|
|
|
||
|
|
mtc0 zero, CP0_TAGLO, 2
|
||
|
|
|
||
|
|
2: cache INDEX_STORE_TAG_D, 0(a0)
|
||
|
|
addiu a0, CONFIG_SYS_DCACHE_LINE_SIZE
|
||
|
|
bne a0, a1, 2b
|
||
|
|
nop
|
||
|
|
|
||
|
|
/* Set KSEG0 Cachable */
|
||
|
|
mfc0 t0, CP0_CONFIG
|
||
|
|
and t0, t0, MIPS_CONF_IMPL
|
||
|
|
or t0, t0, CONF_CM_CACHABLE_NONCOHERENT
|
||
|
|
mtc0 t0, CP0_CONFIG
|
||
|
|
ehb
|
||
|
|
|
||
|
|
/* Lock D-Cache */
|
||
|
|
PTR_LI a0, CACHE_STACK_BASE /* D-Cache lock base */
|
||
|
|
li a1, CACHE_STACK_SIZE /* D-Cache lock size */
|
||
|
|
li a2, 0x1ffff800 /* Mask of DTagLo[PTagLo] */
|
||
|
|
|
||
|
|
3:
|
||
|
|
/* Lock one cacheline */
|
||
|
|
and t0, a0, a2
|
||
|
|
ori t0, 0xe0 /* Valid & Dirty & Lock bits */
|
||
|
|
mtc0 t0, CP0_TAGLO, 2 /* Write to DTagLo */
|
||
|
|
ehb
|
||
|
|
cache INDEX_STORE_TAG_D, 0(a0)
|
||
|
|
|
||
|
|
addiu a0, CONFIG_SYS_DCACHE_LINE_SIZE
|
||
|
|
sub a1, CONFIG_SYS_DCACHE_LINE_SIZE
|
||
|
|
bnez a1, 3b
|
||
|
|
nop
|
||
|
|
#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
|
||
|
|
|
||
|
|
jr ra
|
||
|
|
nop
|
||
|
|
END(mips_sram_init)
|
||
|
|
|
||
|
|
NESTED(lowlevel_init, 0, ra)
|
||
|
|
/* Save ra and do real lowlevel initialization */
|
||
|
|
move s0, ra
|
||
|
|
|
||
|
|
PTR_LA t9, mt7628_init
|
||
|
|
jalr t9
|
||
|
|
nop
|
||
|
|
|
||
|
|
move ra, s0
|
||
|
|
|
||
|
|
#if CONFIG_IS_ENABLED(INIT_STACK_WITHOUT_MALLOC_F)
|
||
|
|
/* Set malloc base */
|
||
|
|
li t0, (CONFIG_SYS_INIT_SP_ADDR + 15) & (~15)
|
||
|
|
PTR_S t0, GD_MALLOC_BASE(k0) # gd->malloc_base offset
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Write back data in locked cache to DRAM */
|
||
|
|
PTR_LI a0, CACHE_STACK_BASE /* D-Cache unlock base */
|
||
|
|
li a1, CACHE_STACK_SIZE /* D-Cache unlock size */
|
||
|
|
|
||
|
|
1:
|
||
|
|
cache HIT_WRITEBACK_INV_D, 0(a0)
|
||
|
|
addiu a0, CONFIG_SYS_DCACHE_LINE_SIZE
|
||
|
|
sub a1, CONFIG_SYS_DCACHE_LINE_SIZE
|
||
|
|
bnez a1, 1b
|
||
|
|
nop
|
||
|
|
|
||
|
|
/* Set KSEG0 Uncached */
|
||
|
|
mfc0 t0, CP0_CONFIG
|
||
|
|
and t0, t0, MIPS_CONF_IMPL
|
||
|
|
or t0, t0, CONF_CM_UNCACHED
|
||
|
|
mtc0 t0, CP0_CONFIG
|
||
|
|
ehb
|
||
|
|
|
||
|
|
jr ra
|
||
|
|
nop
|
||
|
|
END(lowlevel_init)
|