diff options
Diffstat (limited to 'board/freescale/mx53_smd/lowlevel_init.S')
| -rw-r--r-- | board/freescale/mx53_smd/lowlevel_init.S | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/board/freescale/mx53_smd/lowlevel_init.S b/board/freescale/mx53_smd/lowlevel_init.S new file mode 100644 index 0000000000..363db566ce --- /dev/null +++ b/board/freescale/mx53_smd/lowlevel_init.S @@ -0,0 +1,240 @@ +/* + * Copyright (C) 2010 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <config.h> +#include <asm/arch/mx53.h> + +/* + * L2CC Cache setup/invalidation/disable + */ +.macro init_l2cc + /* explicitly disable L2 cache */ + mrc 15, 0, r0, c1, c0, 1 + bic r0, r0, #0x2 + mcr 15, 0, r0, c1, c0, 1 + + /* reconfigure L2 cache aux control reg */ + mov r0, #0xC0 /* tag RAM */ + add r0, r0, #0x4 /* data RAM */ + orr r0, r0, #(1 << 24) /* disable write allocate delay */ + orr r0, r0, #(1 << 23) /* disable write allocate combine */ + orr r0, r0, #(1 << 22) /* disable write allocate */ + + mcr 15, 1, r0, c9, c0, 2 +.endm /* init_l2cc */ + +/* AIPS setup - Only setup MPROTx registers. + * The PACR default values are good.*/ +.macro init_aips + /* + * Set all MPROTx to be non-bufferable, trusted for R/W, + * not forced to user-mode. + */ + ldr r0, =AIPS1_BASE_ADDR + ldr r1, =0x77777777 + str r1, [r0, #0x0] + str r1, [r0, #0x4] + ldr r0, =AIPS2_BASE_ADDR + str r1, [r0, #0x0] + str r1, [r0, #0x4] +.endm /* init_aips */ + +.macro setup_pll pll, freq + ldr r0, =\pll + ldr r1, =0x00001232 + str r1, [r0, #PLL_DP_CTL] + mov r1, #0x2 + str r1, [r0, #PLL_DP_CONFIG] + + ldr r1, W_DP_OP_\freq + str r1, [r0, #PLL_DP_OP] + str r1, [r0, #PLL_DP_HFS_OP] + + ldr r1, W_DP_MFD_\freq + str r1, [r0, #PLL_DP_MFD] + str r1, [r0, #PLL_DP_HFS_MFD] + + ldr r1, W_DP_MFN_\freq + str r1, [r0, #PLL_DP_MFN] + str r1, [r0, #PLL_DP_HFS_MFN] + + ldr r1, =0x00001232 + str r1, [r0, #PLL_DP_CTL] +1: ldr r1, [r0, #PLL_DP_CTL] + ands r1, r1, #0x1 + beq 1b +.endm + +.macro init_clock + ldr r0, =ROM_SI_REV + ldr r1, [r0] + cmp r1, #0x20 + + /* For TO2 only, set LDO to 1.3V */ + ldr r0, =0x53fa8000 + ldr r1, =0x00194005 + streq r1, [r0, #0x04] + + ldr r0, CCM_BASE_ADDR_W + + /* Switch ARM to step clock */ + mov r1, #0x4 + str r1, [r0, #CLKCTL_CCSR] + + setup_pll PLL1_BASE_ADDR, 1000 + + setup_pll PLL3_BASE_ADDR, 400 + + /* Switch peripheral to PLL3 */ + ldr r0, CCM_BASE_ADDR_W + ldr r1, CCM_VAL_0x00015154 + str r1, [r0, #CLKCTL_CBCMR] + ldr r1, CCM_VAL_0x02888945 + orr r1, r1, #(1 << 16) + str r1, [r0, #CLKCTL_CBCDR] + /* make sure change is effective */ +1: ldr r1, [r0, #CLKCTL_CDHIPR] + cmp r1, #0x0 + bne 1b + + setup_pll PLL2_BASE_ADDR, CONFIG_SYS_PLL2_FREQ + + /* Switch peripheral to PLL2 */ + ldr r0, CCM_BASE_ADDR_W + ldr r1, CCM_VAL_0x00808145 + orr r1, r1, #(CONFIG_SYS_AHB_PODF << 10) + orr r1, r1, #(CONFIG_SYS_AXIA_PODF << 16) + orr r1, r1, #(CONFIG_SYS_AXIB_PODF << 19) + str r1, [r0, #CLKCTL_CBCDR] + + ldr r1, CCM_VAL_0x00016154 + str r1, [r0, #CLKCTL_CBCMR] + + /* make sure change is effective */ +1: ldr r1, [r0, #CLKCTL_CDHIPR] + cmp r1, #0x0 + bne 1b + + setup_pll PLL3_BASE_ADDR, 216 + + /* Set the platform clock dividers */ + ldr r0, PLATFORM_BASE_ADDR_W + ldr r1, PLATFORM_CLOCK_DIV_W + str r1, [r0, #PLATFORM_ICGC] + + ldr r0, CCM_BASE_ADDR_W + mov r1, #0 + str r1, [r0, #CLKCTL_CACRR] + + /* Switch ARM back to PLL 1. */ + mov r1, #0x0 + str r1, [r0, #CLKCTL_CCSR] + + ldr r1, [r0, #CLKCTL_CSCDR1] + orr r1, r1, #0x3f + eor r1, r1, #0x3f + orr r1, r1, #0x21 + str r1, [r0, #CLKCTL_CSCDR1] + + /* Restore the default values in the Gate registers */ + ldr r1, =0xFFFFFFFF + str r1, [r0, #CLKCTL_CCGR0] + str r1, [r0, #CLKCTL_CCGR1] + str r1, [r0, #CLKCTL_CCGR2] + str r1, [r0, #CLKCTL_CCGR3] + str r1, [r0, #CLKCTL_CCGR4] + str r1, [r0, #CLKCTL_CCGR5] + str r1, [r0, #CLKCTL_CCGR6] + str r1, [r0, #CLKCTL_CCGR7] + + mov r1, #0x00000 + str r1, [r0, #CLKCTL_CCDR] + + /* for cko - for ARM div by 8 */ + mov r1, #0x000A0000 + add r1, r1, #0x00000F0 + str r1, [r0, #CLKCTL_CCOSR] +.endm + +.section ".text.init", "x" + +.globl lowlevel_init +lowlevel_init: + +#ifdef ENABLE_IMPRECISE_ABORT + mrs r1, spsr /* save old spsr */ + mrs r0, cpsr /* read out the cpsr */ + bic r0, r0, #0x100 /* clear the A bit */ + msr spsr, r0 /* update spsr */ + add lr, pc, #0x8 /* update lr */ + movs pc, lr /* update cpsr */ + nop + nop + nop + nop + msr spsr, r1 /* restore old spsr */ +#endif + + /* SYS_ON_OFF_CTL (GPIO7) must be set to HIGH as the + * first action in the BOOT sequence. + */ + ldr r0, =GPIO1_BASE_ADDR + ldr r1, [r0, #0x0] + orr r1, r1, #(1 << 7) + str r1, [r0, #0x0] + ldr r1, [r0, #0x4] + orr r1, r1, #(1 << 7) + str r1, [r0, #0x4] + + /* ARM errata ID #468414 */ + mrc 15, 0, r1, c1, c0, 1 + orr r1, r1, #(1 << 5) /* enable L1NEON bit */ + mcr 15, 0, r1, c1, c0, 1 + + init_l2cc + + init_aips + + init_clock + + mov pc, lr + +/* Board level setting value */ +CCM_BASE_ADDR_W: .word CCM_BASE_ADDR +CCM_VAL_0x00016154: .word 0x00016154 +CCM_VAL_0x00808145: .word 0x00808145 +CCM_VAL_0x00015154: .word 0x00015154 +CCM_VAL_0x02888945: .word 0x02888945 +W_DP_OP_1000: .word DP_OP_1000 +W_DP_MFD_1000: .word DP_MFD_1000 +W_DP_MFN_1000: .word DP_MFN_1000 +W_DP_OP_800: .word DP_OP_800 +W_DP_MFD_800: .word DP_MFD_800 +W_DP_MFN_800: .word DP_MFN_800 +W_DP_OP_600: .word DP_OP_600 +W_DP_MFD_600: .word DP_MFD_600 +W_DP_MFN_600: .word DP_MFN_600 +W_DP_OP_400: .word DP_OP_400 +W_DP_MFD_400: .word DP_MFD_400 +W_DP_MFN_400: .word DP_MFN_400 +W_DP_OP_216: .word DP_OP_216 +W_DP_MFD_216: .word DP_MFD_216 +W_DP_MFN_216: .word DP_MFN_216 +PLATFORM_BASE_ADDR_W: .word ARM_BASE_ADDR +PLATFORM_CLOCK_DIV_W: .word 0x00000124 |