/*
* armboot - Startup Code for ARM720 CPU-core
*
- * Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
- * Copyright (c) 2002 Alex Z
üpke <azu@sysgo.de>
+ * Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
+ * Copyright (c) 2002 Alex Z
üpke <azu@sysgo.de>
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
-
+#include <asm-offsets.h>
#include <config.h>
#include <version.h>
#include <asm/hardware.h>
-/*
- *************************************************************************
- *
- * Jump vector table as in table 3.1 in [1]
- *
- *************************************************************************
- */
-
-
-.globl _start
-_start: b reset
- ldr pc, _undefined_instruction
- ldr pc, _software_interrupt
- ldr pc, _prefetch_abort
- ldr pc, _data_abort
-#ifdef CONFIG_LPC2292
- .word 0xB4405F76 /* 2's complement of the checksum of the vectors */
-#else
- ldr pc, _not_used
-#endif
- ldr pc, _irq
- ldr pc, _fiq
-
-_undefined_instruction: .word undefined_instruction
-_software_interrupt: .word software_interrupt
-_prefetch_abort: .word prefetch_abort
-_data_abort: .word data_abort
-_not_used: .word not_used
-_irq: .word irq
-_fiq: .word fiq
-
- .balignl 16,0xdeadbeef
-
-
/*
*************************************************************************
*
*************************************************************************
*/
-_TEXT_BASE:
- .word TEXT_BASE
-
-.globl _armboot_start
-_armboot_start:
- .word _start
-
-/*
- * These are defined in the board-specific linker script.
- */
-.globl _bss_start
-_bss_start:
- .word __bss_start
-
-.globl _bss_end
-_bss_end:
- .word _end
-
-#ifdef CONFIG_USE_IRQ
-/* IRQ stack memory (calculated at run-time) */
-.globl IRQ_STACK_START
-IRQ_STACK_START:
- .word 0x0badc0de
-
-/* IRQ stack memory (calculated at run-time) */
-.globl FIQ_STACK_START
-FIQ_STACK_START:
- .word 0x0badc0de
-#endif
-
-
-/*
- * the actual reset code
- */
+ .globl reset
reset:
/*
*/
mrs r0,cpsr
bic r0,r0,#0x1f
- orr r0,r0,#0x13
+ orr r0,r0,#0xd3
msr cpsr,r0
/*
bl cpu_init_crit
#endif
-#ifdef CONFIG_LPC2292
- bl lowlevel_init
-#endif
+ bl _main
-#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
+/*------------------------------------------------------------------------------*/
-#if TEXT_BASE
-#ifndef CONFIG_LPC2292 /* already done in lowlevel_init */
- ldr r2, =0x0 /* Relocate the exception vectors */
- cmp r1, r2 /* and associated data to address */
- ldmneia r0!, {r3-r10} /* 0x0. Do nothing if TEXT_BASE is */
- stmneia r2!, {r3-r10} /* 0x0. Copy the first 15 words. */
- ldmneia r0, {r3-r9}
- stmneia r2, {r3-r9}
- adrne r0, _start /* restore r0 */
-#endif /* !CONFIG_LPC2292 */
-#endif
+ .globl c_runtime_cpu_setup
+c_runtime_cpu_setup:
- ldr r2, _armboot_start
- ldr r3, _bss_start
- sub r2, r3, r2 /* r2 <- size of armboot */
- add r2, r0, r2 /* r2 <- source end address */
-
-copy_loop:
- 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 */
-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 */
- bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
-
-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
-
- ldr pc, _start_armboot
-
-_start_armboot: .word start_armboot
+ mov pc, lr
/*
*************************************************************************
*************************************************************************
*/
-#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
-
-/* Interupt-Controller base addresses */
-INTMR1: .word 0x80000280 @ 32 bit size
-INTMR2: .word 0x80001280 @ 16 bit size
-INTMR3: .word 0x80002280 @ 8 bit size
-
-/* SYSCONs */
-SYSCON1: .word 0x80000100
-SYSCON2: .word 0x80001100
-SYSCON3: .word 0x80002200
-
-#define CLKCTL 0x6 /* mask */
-#define CLKCTL_18 0x0 /* 18.432 MHz */
-#define CLKCTL_36 0x2 /* 36.864 MHz */
-#define CLKCTL_49 0x4 /* 49.152 MHz */
-#define CLKCTL_73 0x6 /* 73.728 MHz */
-
-#elif defined(CONFIG_LPC2292)
-PLLCFG_ADR: .word PLLCFG
-PLLFEED_ADR: .word PLLFEED
-PLLCON_ADR: .word PLLCON
-PLLSTAT_ADR: .word PLLSTAT
-VPBDIV_ADR: .word VPBDIV
-MEMMAP_ADR: .word MEMMAP
-
-#endif
-
+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
cpu_init_crit:
-#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
-
- /*
- * mask all IRQs by clearing all bits in the INTMRs
- */
- mov r1, #0x00
- ldr r0, INTMR1
- str r1, [r0]
- ldr r0, INTMR2
- str r1, [r0]
- ldr r0, INTMR3
- str r1, [r0]
- /*
- * flush v4 I/D caches
- */
- mov r0, #0
- mcr p15, 0, r0, c7, c7, 0 /* flush v3/v4 cache */
- mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */
-
- /*
- * disable MMU stuff and caches
- */
- mrc p15,0,r0,c1,c0
- bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
- bic r0, r0, #0x0000008f @ clear bits 7, 3:0 (B--- WCAM)
- orr r0, r0, #0x00000002 @ set bit 2 (A) Align
- mcr p15,0,r0,c1,c0
-#elif defined(CONFIG_NETARM)
- /*
- * prior to software reset : need to set pin PORTC4 to be *HRESET
- */
- ldr r0, =NETARM_GEN_MODULE_BASE
- ldr r1, =(NETARM_GEN_PORT_MODE(0x10) | \
- NETARM_GEN_PORT_DIR(0x10))
- str r1, [r0, #+NETARM_GEN_PORTC]
- /*
- * software reset : see HW Ref. Guide 8.2.4 : Software Service register
- * for an explanation of this process
- */
- ldr r0, =NETARM_GEN_MODULE_BASE
- ldr r1, =NETARM_GEN_SW_SVC_RESETA
- str r1, [r0, #+NETARM_GEN_SOFTWARE_SERVICE]
- ldr r1, =NETARM_GEN_SW_SVC_RESETB
- str r1, [r0, #+NETARM_GEN_SOFTWARE_SERVICE]
- ldr r1, =NETARM_GEN_SW_SVC_RESETA
- str r1, [r0, #+NETARM_GEN_SOFTWARE_SERVICE]
- ldr r1, =NETARM_GEN_SW_SVC_RESETB
- str r1, [r0, #+NETARM_GEN_SOFTWARE_SERVICE]
- /*
- * setup PLL and System Config
- */
- ldr r0, =NETARM_GEN_MODULE_BASE
-
- ldr r1, =( NETARM_GEN_SYS_CFG_LENDIAN | \
- NETARM_GEN_SYS_CFG_BUSFULL | \
- NETARM_GEN_SYS_CFG_USER_EN | \
- NETARM_GEN_SYS_CFG_ALIGN_ABORT | \
- NETARM_GEN_SYS_CFG_BUSARB_INT | \
- NETARM_GEN_SYS_CFG_BUSMON_EN )
-
- str r1, [r0, #+NETARM_GEN_SYSTEM_CONTROL]
-
-#ifndef CONFIG_NETARM_PLL_BYPASS
- ldr r1, =( NETARM_GEN_PLL_CTL_PLLCNT(NETARM_PLL_COUNT_VAL) | \
- NETARM_GEN_PLL_CTL_POLTST_DEF | \
- NETARM_GEN_PLL_CTL_INDIV(1) | \
- NETARM_GEN_PLL_CTL_ICP_DEF | \
- NETARM_GEN_PLL_CTL_OUTDIV(2) )
- str r1, [r0, #+NETARM_GEN_PLL_CONTROL]
-#endif
-
- /*
- * mask all IRQs by clearing all bits in the INTMRs
- */
- mov r1, #0
- ldr r0, =NETARM_GEN_MODULE_BASE
- str r1, [r0, #+NETARM_GEN_INTR_ENABLE]
-
-#elif defined(CONFIG_S3C4510B)
-
- /*
- * Mask off all IRQ sources
- */
- ldr r1, =REG_INTMASK
- ldr r0, =0x3FFFFF
- str r0, [r1]
-
- /*
- * Disable Cache
- */
- ldr r0, =REG_SYSCFG
- ldr r1, =0x83ffffa0 /* cache-disabled */
- str r1, [r0]
-
-#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
- /* No specific initialisation for IntegratorAP/CM720T as yet */
-#elif defined(CONFIG_LPC2292)
- /* Set-up PLL */
- mov r3, #0xAA
- mov r4, #0x55
- /* First disconnect and disable the PLL */
- ldr r0, PLLCON_ADR
- mov r1, #0x00
- str r1, [r0]
- ldr r0, PLLFEED_ADR /* start feed sequence */
- str r3, [r0]
- str r4, [r0] /* feed sequence done */
- /* Set new M and P values */
- ldr r0, PLLCFG_ADR
- mov r1, #0x23 /* M=4 and P=2 */
- str r1, [r0]
- ldr r0, PLLFEED_ADR /* start feed sequence */
- str r3, [r0]
- str r4, [r0] /* feed sequence done */
- /* Then enable the PLL */
- ldr r0, PLLCON_ADR
- mov r1, #0x01 /* PLL enable bit */
- str r1, [r0]
- ldr r0, PLLFEED_ADR /* start feed sequence */
- str r3, [r0]
- str r4, [r0] /* feed sequence done */
- /* Wait for the lock */
- ldr r0, PLLSTAT_ADR
- mov r1, #0x400 /* lock bit */
-lock_loop:
- ldr r2, [r0]
- and r2, r1, r2
- cmp r2, #0
- beq lock_loop
- /* And finally connect the PLL */
- ldr r0, PLLCON_ADR
- mov r1, #0x03 /* PLL enable bit and connect bit */
- str r1, [r0]
- ldr r0, PLLFEED_ADR /* start feed sequence */
- str r3, [r0]
- str r4, [r0] /* feed sequence done */
- /* Set-up VPBDIV register */
- ldr r0, VPBDIV_ADR
- mov r1, #0x01 /* VPB clock is same as process clock */
- str r1, [r0]
-#else
-#error No cpu_init_crit() defined for current CPU type
-#endif
-
-#ifdef CONFIG_ARM7_REVD
- /* set clock speed */
- /* !!! we run @ 36 MHz due to a hardware flaw in Rev. D processors */
- /* !!! not doing DRAM refresh properly! */
- ldr r0, SYSCON3
- ldr r1, [r0]
- bic r1, r1, #CLKCTL
- orr r1, r1, #CLKCTL_36
- str r1, [r0]
-#endif
-
-#ifndef CONFIG_LPC2292
mov ip, lr
/*
* before relocating, we have to setup RAM timing
*/
bl lowlevel_init
mov lr, ip
-#endif
mov pc, lr
-
-
-/*
- *************************************************************************
- *
- * Interrupt handling
- *
- *************************************************************************
- */
-
-@
-@ IRQ stack frame.
-@
-#define S_FRAME_SIZE 72
-
-#define S_OLD_R0 68
-#define S_PSR 64
-#define S_PC 60
-#define S_LR 56
-#define S_SP 52
-
-#define S_IP 48
-#define S_FP 44
-#define S_R10 40
-#define S_R9 36
-#define S_R8 32
-#define S_R7 28
-#define S_R6 24
-#define S_R5 20
-#define S_R4 16
-#define S_R3 12
-#define S_R2 8
-#define S_R1 4
-#define S_R0 0
-
-#define MODE_SVC 0x13
-#define I_BIT 0x80
-
-/*
- * use bad_save_user_regs for abort/prefetch/undef/swi ...
- * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
- */
-
- .macro bad_save_user_regs
- sub sp, sp, #S_FRAME_SIZE
- stmia sp, {r0 - r12} @ Calling r0-r12
- add r8, sp, #S_PC
-
- 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
- ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
- add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
-
- add r5, sp, #S_SP
- mov r1, lr
- stmia r5, {r0 - r4} @ save sp_SVC, lr_SVC, pc, cpsr, old_r
- mov r0, sp
- .endm
-
- .macro irq_save_user_regs
- sub sp, sp, #S_FRAME_SIZE
- stmia sp, {r0 - r12} @ Calling r0-r12
- add r8, sp, #S_PC
- stmdb r8, {sp, lr}^ @ Calling SP, LR
- str lr, [r8, #0] @ Save calling PC
- mrs r6, spsr
- str r6, [r8, #4] @ Save CPSR
- str r0, [r8, #8] @ Save OLD_R0
- mov r0, sp
- .endm
-
- .macro irq_restore_user_regs
- ldmia sp, {r0 - lr}^ @ Calling r0 - lr
- mov r0, r0
- ldr lr, [sp, #S_PC] @ Get PC
- add sp, sp, #S_FRAME_SIZE
- subs pc, lr, #4 @ return & move spsr_svc into cpsr
- .endm
-
- .macro get_bad_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 / spsr
- mrs lr, spsr
- str lr, [r13, #4]
-
- mov r13, #MODE_SVC @ prepare SVC-Mode
- msr spsr_c, r13
- mov lr, pc
- movs pc, lr
- .endm
-
- .macro get_irq_stack @ setup IRQ stack
- ldr sp, IRQ_STACK_START
- .endm
-
- .macro get_fiq_stack @ setup FIQ stack
- ldr sp, FIQ_STACK_START
- .endm
-
-/*
- * exception handlers
- */
- .align 5
-undefined_instruction:
- get_bad_stack
- bad_save_user_regs
- bl do_undefined_instruction
-
- .align 5
-software_interrupt:
- get_bad_stack
- bad_save_user_regs
- bl do_software_interrupt
-
- .align 5
-prefetch_abort:
- get_bad_stack
- bad_save_user_regs
- bl do_prefetch_abort
-
- .align 5
-data_abort:
- get_bad_stack
- bad_save_user_regs
- bl do_data_abort
-
- .align 5
-not_used:
- get_bad_stack
- bad_save_user_regs
- bl do_not_used
-
-#ifdef CONFIG_USE_IRQ
-
- .align 5
-irq:
- get_irq_stack
- irq_save_user_regs
- bl do_irq
- irq_restore_user_regs
-
- .align 5
-fiq:
- get_fiq_stack
- /* someone ought to write a more effiction fiq_save_user_regs */
- irq_save_user_regs
- bl do_fiq
- irq_restore_user_regs
-
-#else
-
- .align 5
-irq:
- get_bad_stack
- bad_save_user_regs
- bl do_irq
-
- .align 5
-fiq:
- get_bad_stack
- bad_save_user_regs
- bl do_fiq
-
-#endif
-
-#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
- .align 5
-.globl reset_cpu
-reset_cpu:
- mov ip, #0
- mcr p15, 0, ip, c7, c7, 0 @ invalidate cache
- mcr p15, 0, ip, c8, c7, 0 @ flush TLB (v4)
- mrc p15, 0, ip, c1, c0, 0 @ get ctrl register
- bic ip, ip, #0x000f @ ............wcam
- bic ip, ip, #0x2100 @ ..v....s........
- mcr p15, 0, ip, c1, c0, 0 @ ctrl register
- mov pc, r0
-#elif defined(CONFIG_NETARM)
- .align 5
-.globl reset_cpu
-reset_cpu:
- ldr r1, =NETARM_MEM_MODULE_BASE
- ldr r0, [r1, #+NETARM_MEM_CS0_BASE_ADDR]
- ldr r1, =0xFFFFF000
- and r0, r1, r0
- ldr r1, =(relocate-TEXT_BASE)
- add r0, r1, r0
- ldr r4, =NETARM_GEN_MODULE_BASE
- ldr r1, =NETARM_GEN_SW_SVC_RESETA
- str r1, [r4, #+NETARM_GEN_SOFTWARE_SERVICE]
- ldr r1, =NETARM_GEN_SW_SVC_RESETB
- str r1, [r4, #+NETARM_GEN_SOFTWARE_SERVICE]
- ldr r1, =NETARM_GEN_SW_SVC_RESETA
- str r1, [r4, #+NETARM_GEN_SOFTWARE_SERVICE]
- ldr r1, =NETARM_GEN_SW_SVC_RESETB
- str r1, [r4, #+NETARM_GEN_SOFTWARE_SERVICE]
- mov pc, r0
-#elif defined(CONFIG_S3C4510B)
-/* Nothing done here as reseting the CPU is board specific, depending
- * on external peripherals such as watchdog timers, etc. */
-#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR)
- /* No specific reset actions for IntegratorAP/CM720T as yet */
-#elif defined(CONFIG_LPC2292)
- .align 5
-.globl reset_cpu
-reset_cpu:
- mov pc, r0
-#else
-#error No reset_cpu() defined for current CPU type
-#endif
+#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
projects / karo-tx-uboot.git / blobdiff