diff options
Diffstat (limited to 'board/pleb2/lowlevel_init.S')
| -rw-r--r-- | board/pleb2/lowlevel_init.S | 488 |
1 files changed, 0 insertions, 488 deletions
diff --git a/board/pleb2/lowlevel_init.S b/board/pleb2/lowlevel_init.S deleted file mode 100644 index b95ff9cf2fa..00000000000 --- a/board/pleb2/lowlevel_init.S +++ /dev/null @@ -1,488 +0,0 @@ -/* - * Most of this taken from Redboot hal_platform_setup.h with cleanup - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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 <version.h> -#include <asm/arch/pxa-regs.h> - -DRAM_SIZE: .long CONFIG_SYS_DRAM_SIZE - -/* wait for coprocessor write complete */ - .macro CPWAIT reg - mrc p15,0,\reg,c2,c0,0 - mov \reg,\reg - sub pc,pc,#4 - .endm - -.globl lowlevel_init -lowlevel_init: - - mov r10, lr - - /* Set up GPIO pins first */ - - ldr r0, =GPSR0 - ldr r1, =CONFIG_SYS_GPSR0_VAL - str r1, [r0] - - ldr r0, =GPSR1 - ldr r1, =CONFIG_SYS_GPSR1_VAL - str r1, [r0] - - ldr r0, =GPSR2 - ldr r1, =CONFIG_SYS_GPSR2_VAL - str r1, [r0] - - ldr r0, =GPCR0 - ldr r1, =CONFIG_SYS_GPCR0_VAL - str r1, [r0] - - ldr r0, =GPCR1 - ldr r1, =CONFIG_SYS_GPCR1_VAL - str r1, [r0] - - ldr r0, =GPCR2 - ldr r1, =CONFIG_SYS_GPCR2_VAL - str r1, [r0] - - ldr r0, =GRER0 - ldr r1, =CONFIG_SYS_GRER0_VAL - str r1, [r0] - - ldr r0, =GRER1 - ldr r1, =CONFIG_SYS_GRER1_VAL - str r1, [r0] - - ldr r0, =GRER2 - ldr r1, =CONFIG_SYS_GRER2_VAL - str r1, [r0] - - ldr r0, =GFER0 - ldr r1, =CONFIG_SYS_GFER0_VAL - str r1, [r0] - - ldr r0, =GFER1 - ldr r1, =CONFIG_SYS_GFER1_VAL - str r1, [r0] - - ldr r0, =GFER2 - ldr r1, =CONFIG_SYS_GFER2_VAL - str r1, [r0] - - ldr r0, =GPDR0 - ldr r1, =CONFIG_SYS_GPDR0_VAL - str r1, [r0] - - ldr r0, =GPDR1 - ldr r1, =CONFIG_SYS_GPDR1_VAL - str r1, [r0] - - ldr r0, =GPDR2 - ldr r1, =CONFIG_SYS_GPDR2_VAL - str r1, [r0] - - ldr r0, =GAFR0_L - ldr r1, =CONFIG_SYS_GAFR0_L_VAL - str r1, [r0] - - ldr r0, =GAFR0_U - ldr r1, =CONFIG_SYS_GAFR0_U_VAL - str r1, [r0] - - ldr r0, =GAFR1_L - ldr r1, =CONFIG_SYS_GAFR1_L_VAL - str r1, [r0] - - ldr r0, =GAFR1_U - ldr r1, =CONFIG_SYS_GAFR1_U_VAL - str r1, [r0] - - ldr r0, =GAFR2_L - ldr r1, =CONFIG_SYS_GAFR2_L_VAL - str r1, [r0] - - ldr r0, =GAFR2_U - ldr r1, =CONFIG_SYS_GAFR2_U_VAL - str r1, [r0] - - /* enable GPIO pins */ - ldr r0, =PSSR - ldr r1, =CONFIG_SYS_PSSR_VAL - str r1, [r0] - - -/********************************************************************* - Initlialize Memory Controller - - See PXA250 Operating System Developer's Guide - - pause for 200 uSecs- allow internal clocks to settle - *Note: only need this if hard reset... doing it anyway for now -*/ - - @ Step 1 - @ ---- Wait 200 usec - ldr r3, =OSCR @ reset the OS Timer Count to zero - mov r2, #0 - str r2, [r3] - ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty -1: - ldr r2, [r3] - cmp r4, r2 - bgt 1b - -mem_init: - @ get memory controller base address - ldr r1, =MEMC_BASE - -@**************************************************************************** -@ Step 2 -@ - - @ Step 2a - @ write msc0, read back to ensure data latches - @ - ldr r2, =CONFIG_SYS_MSC0_VAL - str r2, [r1, #MSC0_OFFSET] - ldr r2, [r1, #MSC0_OFFSET] - - @ write msc1 - ldr r2, =CONFIG_SYS_MSC1_VAL - str r2, [r1, #MSC1_OFFSET] - ldr r2, [r1, #MSC1_OFFSET] - - @ write msc2 - ldr r2, =CONFIG_SYS_MSC2_VAL - str r2, [r1, #MSC2_OFFSET] - ldr r2, [r1, #MSC2_OFFSET] - - -@ Step 2b - @ write mecr - ldr r2, =CONFIG_SYS_MECR_VAL - str r2, [r1, #MECR_OFFSET] - - @ write mcmem0 - ldr r2, =CONFIG_SYS_MCMEM0_VAL - str r2, [r1, #MCMEM0_OFFSET] - - @ write mcmem1 - ldr r2, =CONFIG_SYS_MCMEM1_VAL - str r2, [r1, #MCMEM1_OFFSET] - - @ write mcatt0 - ldr r2, =CONFIG_SYS_MCATT0_VAL - str r2, [r1, #MCATT0_OFFSET] - - @ write mcatt1 - ldr r2, =CONFIG_SYS_MCATT1_VAL - str r2, [r1, #MCATT1_OFFSET] - - @ write mcio0 - ldr r2, =CONFIG_SYS_MCIO0_VAL - str r2, [r1, #MCIO0_OFFSET] - - @ write mcio1 - ldr r2, =CONFIG_SYS_MCIO1_VAL - str r2, [r1, #MCIO1_OFFSET] - -@ Step 2c - @ fly-by-dma is defeatured on this part - @ write flycnfg - @ldr r2, =CONFIG_SYS_FLYCNFG_VAL - @str r2, [r1, #FLYCNFG_OFFSET] - -/* FIXME Does this sequence really make sense */ -#ifdef REDBOOT_WAY - @ Step 2d - @ get the mdrefr settings - ldr r3, =CONFIG_SYS_MDREFR_VAL - - @ extract DRI field (we need a valid DRI field) - @ - ldr r2, =0xFFF - - @ valid DRI field in r3 - @ - and r3, r3, r2 - - @ get the reset state of MDREFR - @ - ldr r4, [r1, #MDREFR_OFFSET] - - @ clear the DRI field - @ - bic r4, r4, r2 - - @ insert the valid DRI field loaded above - @ - orr r4, r4, r3 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - - @ *Note: preserve the mdrefr value in r4 * - -@**************************************************************************** -@ Step 3 -@ -@ NO SRAM - - mov pc, r10 - - -@**************************************************************************** -@ Step 4 -@ - - @ Assumes previous mdrefr value in r4, if not then read current mdrefr - - @ clear the free-running clock bits - @ (clear K0Free, K1Free, K2Free - @ - bic r4, r4, #(0x00800000 | 0x01000000 | 0x02000000) - - @ set K0RUN for CPLD clock - @ - orr r4, r4, #0x00002000 - - @ set K1RUN if bank 0 installed - @ - orr r4, r4, #0x00010000 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - ldr r4, [r1, #MDREFR_OFFSET] - - @ deassert SLFRSH - @ - bic r4, r4, #0x00400000 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - - @ assert E1PIN - @ - orr r4, r4, #0x00008000 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - ldr r4, [r1, #MDREFR_OFFSET] - nop - nop -#else - @ Step 2d - @ get the mdrefr settings - ldr r3, =CONFIG_SYS_MDREFR_VAL - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - - @ Step 4 - - @ set K0RUN for CPLD clock - @ - orr r4, r4, #0x00002000 - - @ set K1RUN for bank 0 - @ - orr r4, r4, #0x00010000 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - ldr r4, [r1, #MDREFR_OFFSET] - - @ deassert SLFRSH - @ - bic r4, r4, #0x00400000 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - - @ assert E1PIN - @ - orr r4, r4, #0x00008000 - - @ write back mdrefr - @ - str r4, [r1, #MDREFR_OFFSET] - ldr r4, [r1, #MDREFR_OFFSET] - nop - nop -#endif - - @ Step 4d - @ fetch platform value of mdcnfg - @ - ldr r2, =CONFIG_SYS_MDCNFG_VAL - - @ disable all sdram banks - @ - bic r2, r2, #(MDCNFG_DE0 | MDCNFG_DE1) - bic r2, r2, #(MDCNFG_DE2 | MDCNFG_DE3) - - @ program banks 0/1 for bus width - @ - bic r2, r2, #MDCNFG_DWID0 @0=32-bit - - @ write initial value of mdcnfg, w/o enabling sdram banks - @ - str r2, [r1, #MDCNFG_OFFSET] - - @ Step 4e - @ pause for 200 uSecs - @ - ldr r3, =OSCR @ reset the OS Timer Count to zero - mov r2, #0 - str r2, [r3] - ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty - 1: - ldr r2, [r3] - cmp r4, r2 - bgt 1b - - /* Why is this here??? */ - mov r0, #0x78 @turn everything off - mcr p15, 0, r0, c1, c0, 0 @(caches off, MMU off, etc.) - - @ Step 4f - @ Access memory *not yet enabled* for CBR refresh cycles (8) - @ - CBR is generated for all banks - - ldr r2, =CONFIG_SYS_DRAM_BASE - str r2, [r2] - str r2, [r2] - str r2, [r2] - str r2, [r2] - str r2, [r2] - str r2, [r2] - str r2, [r2] - str r2, [r2] - - @ Step 4g - @get memory controller base address - @ - ldr r1, =MEMC_BASE - - @fetch current mdcnfg value - @ - ldr r3, [r1, #MDCNFG_OFFSET] - - @enable sdram bank 0 if installed (must do for any populated bank) - @ - orr r3, r3, #MDCNFG_DE0 - - @write back mdcnfg, enabling the sdram bank(s) - @ - str r3, [r1, #MDCNFG_OFFSET] - - @ Step 4h - @ write mdmrs - @ - ldr r2, =CONFIG_SYS_MDMRS_VAL - str r2, [r1, #MDMRS_OFFSET] - - @ Done Memory Init - - /*SET_LED 6 */ - - @******************************************************************** - @ Disable (mask) all interrupts at the interrupt controller - @ - - @ clear the interrupt level register (use IRQ, not FIQ) - @ - mov r1, #0 - ldr r2, =ICLR - str r1, [r2] - - @ Set interrupt mask register - @ - ldr r1, =CONFIG_SYS_ICMR_VAL - ldr r2, =ICMR - str r1, [r2] - - @ ******************************************************************** - @ Disable the peripheral clocks, and set the core clock - @ - - @ Turn Off ALL on-chip peripheral clocks for re-configuration - @ - ldr r1, =CKEN - mov r2, #0 - str r2, [r1] - - @ set core clocks - @ - ldr r2, =CONFIG_SYS_CCCR_VAL - ldr r1, =CCCR - str r2, [r1] - - #ifdef ENABLE32KHZ - @ enable the 32Khz oscillator for RTC and PowerManager - @ - ldr r1, =OSCC - mov r2, #OSCC_OON - str r2, [r1] - - @ NOTE: spin here until OSCC.OOK get set, - @ meaning the PLL has settled. - @ -60: - ldr r2, [r1] - ands r2, r2, #1 - beq 60b -#endif - - @ Turn on needed clocks - @ - ldr r1, =CKEN - ldr r2, =CONFIG_SYS_CKEN_VAL - str r2, [r1] - - /*SET_LED 7 */ - -/* Is this needed???? */ -#define NODEBUG -#ifdef NODEBUG - /*Disable software and data breakpoints */ - mov r0,#0 - mcr p15,0,r0,c14,c8,0 /* ibcr0 */ - mcr p15,0,r0,c14,c9,0 /* ibcr1 */ - mcr p15,0,r0,c14,c4,0 /* dbcon */ - - /*Enable all debug functionality */ - mov r0,#0x80000000 - mcr p14,0,r0,c10,c0,0 /* dcsr */ - -#endif - - mov pc, r10 - -@ End lowlevel_init |