*
* Copyright (c) 2003 Texas Instruments
*
- * ----- Adapted for OMAP1610 from ARM925t code ------
+ * ----- Adapted for OMAP1610 OMAP730 from ARM925t code ------
*
* Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
* Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
- * Copyright (c) 2002 Gary Jennejohn <gj@denx.de>
+ * Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
* Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com>
* Copyright (c) 2003 Kshitij <kshitij@ti.com>
*
*/
-
#include <config.h>
+#include <common.h>
#include <version.h>
#if defined(CONFIG_OMAP1610)
#include <./configs/omap1510.h>
+#elif defined(CONFIG_OMAP730)
+#include <./configs/omap730.h>
#endif
/*
*************************************************************************
*/
-/*
- * CFG_MEM_END is in the board dependent config-file (configs/config_BOARD.h)
- */
_TEXT_BASE:
.word TEXT_BASE
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
- .word 0x0badc0de
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
/*
* the actual reset code
*/
-
+.globl reset
reset:
/*
* set the cpu to SVC32 mode
orr r0,r0,#0xd3
msr cpsr,r0
-
- /*
- * turn off the watchdog, unlock/diable sequence
- */
- mov r1, #0xF5
- ldr r0, =WDTIM_MODE
- strh r1, [r0]
- mov r1, #0xA0
- strh r1, [r0]
-
-
-
-
-
/*
- * mask all IRQs by setting all bits in the INTMR - default
+ * we do sys-critical inits only at reboot,
+ * not when booting from ram!
*/
-
- mov r1, #0xffffffff
- ldr r0, =REG_IHL1_MIR
- str r1, [r0]
- ldr r0, =REG_IHL2_MIR
- str r1, [r0]
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
bl cpu_init_crit
+#endif
+
+#ifndef CONFIG_SKIP_RELOCATE_UBOOT
+relocate: /* relocate U-Boot to RAM */
+ adr r0, _start /* r0 <- current position of code */
+ ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
+ cmp r0, r1 /* don't reloc during debug */
+ beq stack_setup
-relocate:
- /*
- * relocate armboot to RAM
- */
- adr r0, _start /* r0 <- current position of code */
ldr r2, _armboot_start
- ldr r3, _armboot_end
- sub r2, r3, r2 /* r2 <- size of armboot */
- ldr r1, _TEXT_BASE /* r1 <- destination address */
- add r2, r0, r2 /* r2 <- source end address */
+ ldr r3, _bss_start
+ sub r2, r3, r2 /* r2 <- size of armboot */
+ add r2, r0, r2 /* r2 <- source end address */
- /*
- * r0 = source address
- * r1 = target address
- * r2 = source end address
- */
copy_loop:
- ldmia r0!, {r3-r10}
- stmia r1!, {r3-r10}
- cmp r0, r2
+ ldmia r0!, {r3-r10} /* copy from source address [r0] */
+ stmia r1!, {r3-r10} /* copy to target address [r1] */
+ cmp r0, r2 /* until source end addreee [r2] */
ble copy_loop
+#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
- /* set up the stack */
- ldr r0, _armboot_end
- add r0, r0, #CONFIG_STACKSIZE
- sub sp, r0, #12 /* leave 3 words for abort-stack */
+ /* Set up the stack */
+stack_setup:
+ ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
+ sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */
+ sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */
+#ifdef CONFIG_USE_IRQ
+ sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
+ sub sp, r0, #12 /* leave 3 words for abort-stack */
+
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ ble clbss_l
+
+ bl coloured_LED_init
+ bl red_LED_on
ldr pc, _start_armboot
*
*************************************************************************
*/
-
-
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
cpu_init_crit:
/*
* flush v4 I/D caches
* Go setup Memory and board specific bits prior to relocation.
*/
mov ip, lr /* perserve link reg across call */
- bl platformsetup /* go setup pll,mux,memory */
+ bl lowlevel_init /* go setup pll,mux,memory */
mov lr, ip /* restore link */
mov pc, lr /* back to my caller */
+#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
+
/*
*************************************************************************
*
@ carve out a frame on current user stack
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
- ldr r2, _armboot_end @ find top of stack
- add r2, r2, #CONFIG_STACKSIZE @ find base of normal stack
- sub r2, r2, #8 @ set base 2 words into abort stack
+
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN)
+ sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
@ get values for "aborted" pc and cpsr (into parm regs)
ldmia r2, {r2 - r3}
add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack
.endm
.macro get_bad_stack
- @ get bottom of stack (into sp by by user stack pointer).
- ldr r13, _armboot_end
- @ head to reserved words at the top of the stack
- add r13, r13, #CONFIG_STACKSIZE
- sub r13, r13, #8 @ reserved a couple spots in abort stack
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN)
+ sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr in position 0 of saved stack
mrs lr, spsr @ get the spsr
irq:
get_irq_stack
irq_save_user_regs
- bl do_irq
+ bl do_irq
irq_restore_user_regs
.align 5
get_fiq_stack
/* someone ought to write a more effiction fiq_save_user_regs */
irq_save_user_regs
- bl do_fiq
+ bl do_fiq
irq_restore_user_regs
#else
bl do_fiq
#endif
-
- .align 5
-.globl reset_cpu
-reset_cpu:
- ldr r1, rstctl1 /* get clkm1 reset ctl */
- mov r3, #0x0
- strh r3, [r1] /* clear it */
- mov r3, #0x8
- strh r3, [r1] /* force dsp+arm reset */
-_loop_forever:
- b _loop_forever
-
-
-rstctl1:
- .word 0xfffece10
projects / karo-tx-uboot.git / blobdiff