diff options
Diffstat (limited to 'board')
| -rw-r--r-- | board/freescale/mx51_bbg/lowlevel_init.S | 171 |
1 files changed, 99 insertions, 72 deletions
diff --git a/board/freescale/mx51_bbg/lowlevel_init.S b/board/freescale/mx51_bbg/lowlevel_init.S index e974a5f..b8abae4 100644 --- a/board/freescale/mx51_bbg/lowlevel_init.S +++ b/board/freescale/mx51_bbg/lowlevel_init.S @@ -36,9 +36,22 @@ * L2CC Cache setup/invalidation/disable */ .macro init_l2cc - /* reconfigure L2 cache aux control reg */ - ldr r0, =0x03C000C4 - mcr p15, 1, r0, c9, c0, 2 + /* 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 */ + + cmp r3, #0x10 /* r3 contains the silicon rev */ + orrls r0, r0, #(1 << 25) /* ENGcm09124: disable write combine for TO 2 and lower revs */ + + mcr 15, 1, r0, c9, c0, 2 .endm /* init_l2cc */ /* AIPS setup - Only setup MPROTx registers. @@ -126,26 +139,52 @@ .macro init_clock ldr r0, =CCM_BASE_ADDR - mov r1, #0x00060000 - str r1, [r0, #CLKCTL_CCDR] + + /* Gate of clocks to the peripherals first */ + ldr r1, =0x3FFFFFFF + str r1, [r0, #CLKCTL_CCGR0] + ldr r1, =0x0 + str r1, [r0, #CLKCTL_CCGR1] + str r1, [r0, #CLKCTL_CCGR2] + str r1, [r0, #CLKCTL_CCGR3] + + ldr r1, =0x00030000 + str r1, [r0, #CLKCTL_CCGR4] + ldr r1, =0x00FFF030 + str r1, [r0, #CLKCTL_CCGR5] + ldr r1, =0x00000300 + str r1, [r0, #CLKCTL_CCGR6] + + /* Disable IPU and HSC dividers */ + mov r1, #0x60000 + str r1, [r0, #CLKCTL_CCDR] + + /* Make sure to switch the DDR away from PLL 1 */ + ldr r1, =0x19239145 + str r1, [r0, #CLKCTL_CBCDR] + /* make sure divider effective */ +1: ldr r1, [r0, #CLKCTL_CDHIPR] + cmp r1, #0x0 + bne 1b /* Switch ARM to step clock */ mov r1, #0x4 str r1, [r0, #CLKCTL_CCSR] - mov r3, #DP_OP_800 mov r4, #DP_MFD_800 mov r5, #DP_MFN_800 setup_pll PLL1_BASE_ADDR + mov r3, #DP_OP_665 mov r4, #DP_MFD_665 mov r5, #DP_MFN_665 setup_pll PLL3_BASE_ADDR /* Switch peripheral to PLL 3 */ - ldr r1, =0x0000D3C0 + ldr r0, =CCM_BASE_ADDR + ldr r1, =0x000010C0 str r1, [r0, #CLKCTL_CBCMR] - ldr r1, =0x033B9145 + ldr r1, =0x13239145 str r1, [r0, #CLKCTL_CBCDR] mov r3, #DP_OP_665 mov r4, #DP_MFD_665 @@ -153,9 +192,10 @@ setup_pll PLL2_BASE_ADDR /* Switch peripheral to PLL2 */ - ldr r1, =0x013B9145 + ldr r0, =CCM_BASE_ADDR + ldr r1, =0x19239145 str r1, [r0, #CLKCTL_CBCDR] - ldr r1, =0x0000E3C0 + ldr r1, =0x000020C0 str r1, [r0, #CLKCTL_CBCMR] mov r3, #DP_OP_216 @@ -163,30 +203,39 @@ mov r5, #DP_MFN_216 setup_pll PLL3_BASE_ADDR + /* Set the platform clock dividers */ - ldr r2, =ARM_BASE_ADDR + ldr r0, =ARM_BASE_ADDR ldr r1, =0x00000725 - str r1, [r2, #0x14] + str r1, [r0, #0x14] + + ldr r0, =CCM_BASE_ADDR + mov r1, #0x1 + str r1, [r0, #CLKCTL_CACRR] /* Switch ARM back to PLL 1 */ mov r1, #0 - str r1, [r0, #CLKCTL_CCSR] - str r1, [r0, #CLKCTL_CACRR] + str r1, [r0, #CLKCTL_CCSR] + /* setup the rest */ /* Use lp_apm (24MHz) source for perclk */ - mov r2, #0x48 - ldr r2, [r0] - cmp r2, #0x10 - ldrhs r1, =0x000020C2 - ldrlo r1, =0x0000E3C2 + ldr r1, =0x000020C2 str r1, [r0, #CLKCTL_CBCMR] - /* TO1.x emi = ahb, all perclk dividers are 1 since using 24MHz */ - /* TO2.x ddr from PLL1, all perclk dividers are 1 since using 24MHz */ - ldrhs r1, =0x59239100 - ldrlo r1, =0x013D9100 - strlo r1, [r0, #CLKCTL_CBCDR] + /* ddr clock from PLL 1, all perclk dividers are 1 since using 24MHz */ + ldr r1, =0x59E35100 + str r1, [r0, #CLKCTL_CBCDR] - /* use PLL2 for UART source, get 66.5MHz */ + /* 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] + + /* Use PLL 2 for UART's, get 66.5MHz from it */ ldr r1, =0xA5A2A020 str r1, [r0, #CLKCTL_CSCMR1] ldr r1, =0x00C30321 @@ -194,11 +243,16 @@ /* make sure divider effective */ 1: ldr r1, [r0, #CLKCTL_CDHIPR] - cmp r1, #0 + cmp r1, #0x0 bne 1b mov r1, #0x0 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 .macro setup_wdog @@ -211,48 +265,27 @@ .globl lowlevel_init lowlevel_init: - /* Platform CHIP level init*/ ldr r0, =GPIO1_BASE_ADDR - ldr r1, [r0, #0x0] - orr r1, r1, #(1 << 23) - str r1, [r0, #0x0] - ldr r1, [r0, #0x4] - orr r1, r1, #(1 << 23) - str r1, [r0, #0x4] - -#ifdef TURN_OFF_IMPRECISE_ABORT - mrs r0, cpsr - bic r0, r0, #0x100 - msr cpsr, r0 -#endif - - mrc 15, 0, r1, c1, c0, 0 - -#ifndef BRANCH_PREDICTION_ENABLE - mrc 15, 0, r0, c1, c0, 1 - bic r0, r0, #7 - mcr 15, 0, r0, c1, c0, 1 -#else - mrc 15, 0, r0, c1, c0, 1 - orr r0, r0, #7 - mcr 15, 0, r0, c1, c0, 1 - orr r1, r1, #(1<<11) -#endif - -#ifdef UNALIGNED_ACCESS_ENABLE - orr r1, r1, #(1<<22) -#endif - -#ifdef LOW_INT_LATENCY_ENABLE - orr r1, r1, #(1<<21) -#endif - mcr 15, 0, r1, c1, c0, 0 + ldr r1, [r0, #0x0] + orr r1, r1, #(1 << 23) + str r1, [r0, #0x0] + ldr r1, [r0, #0x4] + orr r1, r1, #(1 << 23) + str r1, [r0, #0x4] - mov r0, #0 -#ifdef BRANCH_PREDICTION_ENABLE - mcr 15, 0, r0, c15, c2, 4 +#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 - mcr 15, 0, r0, c7, c10, 4 /* Drain the write buffer */ init_l2cc @@ -264,15 +297,9 @@ lowlevel_init: init_drive_strength - cmp pc, #PHYS_SDRAM_1 - blo init_clock_start - cmp pc, #(PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE) - blo init_clock_start - -init_clock_start: init_clock + init_debug_board - /*init_sdram*/ /* return from mxc_nand_load */ /* r12 saved upper lr*/ |