From:thomas.luo@austriamicrosystems. U-Boot1.1.6 for AS352X Port to U-boot to New ARM base SOC AS352X, support NAND flash Boot. Part 2: Br
Signed-off-by: Thomas Luo
------------------------------------------------------------------------ ---- diff -urN u-boot-1.1.6.org/cpu/arm922t/as352x/Makefile u-boot-1.1.6/cpu/arm922t/as352x/Makefile --- u-boot-1.1.6.org/cpu/arm922t/as352x/Makefile 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/as352x/Makefile 2006-11-29 17:29:07.000000000 +0800 @@ -0,0 +1,45 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.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 +# + +include $(TOPDIR)/config.mk + +LIB = $(obj)lib$(SOC).a + +COBJS = interrupts.o serial.o + +SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) + +all: $(obj).depend $(LIB) + +$(LIB): $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +####################################################################### ## + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +####################################################################### ## diff -urN u-boot-1.1.6.org/cpu/arm922t/as352x/serial.c u-boot-1.1.6/cpu/arm922t/as352x/serial.c --- u-boot-1.1.6.org/cpu/arm922t/as352x/serial.c 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/as352x/serial.c 2006-12-01 17:43:18.000000000 +0800 @@ -0,0 +1,145 @@ +/* +* Copyright (C) 2006 Austriamicrosystems Corporation +* +* 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 <common.h> +#if defined(CONFIG_AS352X) +#include <as352x.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* +* Initialise the serial port with the given baudrate. The settings +* are always 8 data bits, no parity, 1 stop bit, no start bits. +*/ +void serial_setbrg (void) +{ + u8 controlData; + set_reg_bits32(CCU_IO,CCU_IO_UART); + + /* reset the uart + */ + set_reg_bits32(CCU_SRC, CCU_SRC_UART0); + wreg32(CCU_SRL, CCU_SRL_MAGIC_NUMBER); + clr_reg_bits32(CCU_SRC, CCU_SRC_UART0); + wreg32(CCU_SRL, 0x0); + wreg32(UART_FCTL_REG, 0); + wreg32(UART_INTEN_REG, 0); + controlData = 3; + wreg32(UART_LNCTL_REG,controlData| UART_LNCTL_DLSEN); + wreg32(UART_DLO_REG,0x68); + wreg32(UART_DHI_REG,0x0); + wreg32(UART_LNCTL_REG,controlData& (~UART_LNCTL_DLSEN)); + +} +int serial_init (void) +{ + int i; + serial_setbrg(); + for (i = 0; i < 100; i++); + return (0); +} + +/* +* Read a single byte from the serial port. Returns 1 on success, 0 +* otherwise. When the function is succesfull, the character read is +* written into its argument c. +*/ +int serial_getc (void) +{ + u8 c; + + while (!(rreg32(UART_LNSTATUS_REG) & UART_RX_DATA_READY)); + c = rreg32(UART_DATA_REG); + return c&0xff; +} + +#ifdef CONFIG_HWFLOW +static int hwflow = 0; /* turned off by default */ +int hwflow_onoff(int on) +{ + switch(on) { + case 0: + default: + break; /* return current */ + case 1: + hwflow = 0; /* turn on */ + break; + case -1: + hwflow = 0; /* turn off */ + break; + } + return hwflow; +} +#endif + +#ifdef CONFIG_MODEM_SUPPORT +static int be_quiet = 0; +void disable_putc(void) +{ + be_quiet = 1; +} + +void enable_putc(void) +{ + be_quiet = 0; +} +#endif + + +/* +* Output a single byte to the serial port. +*/ +void serial_putc (const char c) +{ +#ifdef CONFIG_MODEM_SUPPORT + if (be_quiet) + return; +#endif + + /* wait for room in the tx FIFO */ + while (!(rreg32(UART_LNSTATUS_REG) & UART_TX_HOLD_REG_EMPTY)); + wreg32(UART_DATA_REG,c); + + + + /* If \n, also do \r */ + if (c == '\n') + serial_putc ('\r'); +} + +/* +* Test whether a character is in the RX buffer +*/ +int serial_tstc (void) +{ + return (rreg32(UART_LNSTATUS_REG) & UART_RX_DATA_READY); +} + +void +serial_puts (const char *s) +{ + while (*s) { + serial_putc (*s++); + } +} + +#endif /* defined(CONFIG_AS352X)*/ diff -urN u-boot-1.1.6.org/cpu/arm922t/config.mk u-boot-1.1.6/cpu/arm922t/config.mk --- u-boot-1.1.6.org/cpu/arm922t/config.mk 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/config.mk 2006-11-24 16:43:15.000000000 +0800 @@ -0,0 +1,34 @@ +# +# (C) Copyright 2002 +# Gary Jennejohn, DENX Software Engineering, gj@denx.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 +# + +PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -ffixed-r8 \ + + +PLATFORM_CPPFLAGS += -march=armv4 +# ======================================================================== = +# +# Supply options according to compiler version +# +# ======================================================================== = +PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) +PLATFORM_RELFLAGS +=$(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) diff -urN u-boot-1.1.6.org/cpu/arm922t/cpu.c u-boot-1.1.6/cpu/arm922t/cpu.c --- u-boot-1.1.6.org/cpu/arm922t/cpu.c 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/cpu.c 2006-12-01 17:43:54.000000000 +0800 @@ -0,0 +1,185 @@ +/* +* (C) Copyright 2002 +* Sysgo Real-Time Solutions, GmbH <www.elinos.com> +* Marius Groeger mgroeger@sysgo.de +* +* (C) Copyright 2002 +* Gary Jennejohn, DENX Software Engineering, gj@denx.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 +*/ + +/* +* CPU specific code +*/ + +#include <common.h> +#include <command.h> +#include <arm922t.h> + +#ifdef CONFIG_USE_IRQ +DECLARE_GLOBAL_DATA_PTR; +#endif + +/* read co-processor 15, register #1 (control register) */ +static unsigned long read_p15_c1 (void) +{ + unsigned long value; + + __asm__ __volatile__( + "mrc p15, 0, %0, c1, c0, 0 @ read control reg\n" + : "=r" (value) + : + : "memory"); + +#ifdef MMU_DEBUG + printf ("p15/c1 is = %08lx\n", value); +#endif + return value; +} + +/* write to co-processor 15, register #1 (control register) */ +static void write_p15_c1 (unsigned long value) +{ +#ifdef MMU_DEBUG + printf ("write %08lx to p15/c1\n", value); +#endif + __asm__ __volatile__( + "mcr p15, 0, %0, c1, c0, 0 @ write it back\n" + : + : "r" (value) + : "memory"); + + read_p15_c1 (); +} + +static void cp_delay (void) +{ + volatile int i; + + /* copro seems to need some delay between reading and writing */ + for (i = 0; i < 100; i++); +} + +/* See also ARM920T Technical reference Manual */ +#define C1_MMU (1<<0) /* mmu off/on */ +#define C1_ALIGN (1<<1) /* alignment faults off/on */ +#define C1_DC (1<<2) /* dcache off/on */ + +#define C1_BIG_ENDIAN (1<<7) /* big endian off/on */ +#define C1_SYS_PROT (1<<8) /* system protection */ +#define C1_ROM_PROT (1<<9) /* ROM protection */ +#define C1_IC (1<<12) /* icache off/on */ +#define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */ + + +int cpu_init (void) +{ + /* + * setup up stacks if necessary + */ +#ifdef CONFIG_USE_IRQ + IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4; + FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; +#endif + return 0; +} + +int cleanup_before_linux (void) +{ + /* + * this function is called just before we call linux + * it prepares the processor for linux + * + * we turn off caches etc ... + */ + + unsigned long i; + + disable_interrupts (); + + /* turn off I/D-cache */ + asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i)); + i &= ~(C1_DC | C1_IC); + asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i)); + + /* flush I/D-cache */ + i = 0; + asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); + + return (0); +} + +int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + disable_interrupts (); + reset_cpu (0); + /*NOTREACHED*/ + return (0); +} + +void icache_enable (void) +{ + ulong reg; + + reg = read_p15_c1 (); /* get control reg. */ + cp_delay (); + write_p15_c1 (reg | C1_IC); +} + +void icache_disable (void) +{ + ulong reg; + + reg = read_p15_c1 (); + cp_delay (); + write_p15_c1 (reg & ~C1_IC); +} + +int icache_status (void) +{ + return (read_p15_c1 () & C1_IC) != 0; +} + +#ifdef USE_922T_MMU +/* It makes no sense to use the dcache if the MMU is not enabled */ +void dcache_enable (void) +{ + ulong reg; + + reg = read_p15_c1 (); + cp_delay (); + write_p15_c1 (reg | C1_DC); +} + +void dcache_disable (void) +{ + ulong reg; + + reg = read_p15_c1 (); + cp_delay (); + reg &= ~C1_DC; + write_p15_c1 (reg); +} + +int dcache_status (void) +{ + return (read_p15_c1 () & C1_DC) != 0; +} +#endif diff -urN u-boot-1.1.6.org/cpu/arm922t/interrupts.c u-boot-1.1.6/cpu/arm922t/interrupts.c --- u-boot-1.1.6.org/cpu/arm922t/interrupts.c 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/interrupts.c 2006-11-23 17:01:25.000000000 +0800 @@ -0,0 +1,167 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger mgroeger@sysgo.de + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke azu@sysgo.de + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, gj@denx.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 + */ + +#include <common.h> +#include <arm920t.h> +#include <asm/proc-armv/ptrace.h> + +#ifdef CONFIG_USE_IRQ +/* enable IRQ interrupts */ +void enable_interrupts (void) +{ + unsigned long temp; + __asm__ __volatile__("mrs %0, cpsr\n" + "bic %0, %0, #0x80\n" + "msr cpsr_c, %0" + : "=r" (temp) + : + : "memory"); +} + + +/* + * disable IRQ/FIQ interrupts + * returns true if interrupts had been enabled before we disabled them + */ +int disable_interrupts (void) +{ + unsigned long old,temp; + __asm__ __volatile__("mrs %0, cpsr\n" + "orr %1, %0, #0xc0\n" + "msr cpsr_c, %1" + : "=r" (old), "=r" (temp) + : + : "memory"); + return (old & 0x80) == 0; +} +#else +void enable_interrupts (void) +{ + return; +} +int disable_interrupts (void) +{ + return 0; +} +#endif + + +void bad_mode (void) +{ + panic ("Resetting CPU ...\n"); + reset_cpu (0); +} + +void show_regs (struct pt_regs *regs) +{ + unsigned long flags; + const char *processor_modes[] = { + "USER_26", "FIQ_26", "IRQ_26", "SVC_26", + "UK4_26", "UK5_26", "UK6_26", "UK7_26", + "UK8_26", "UK9_26", "UK10_26", "UK11_26", + "UK12_26", "UK13_26", "UK14_26", "UK15_26", + "USER_32", "FIQ_32", "IRQ_32", "SVC_32", + "UK4_32", "UK5_32", "UK6_32", "ABT_32", + "UK8_32", "UK9_32", "UK10_32", "UND_32", + "UK12_32", "UK13_32", "UK14_32", "SYS_32", + }; + + flags = condition_codes (regs); + + printf ("pc : [<%08lx>] lr : [<%08lx>]\n" + "sp : %08lx ip : %08lx fp : %08lx\n", + instruction_pointer (regs), + regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp); + printf ("r10: %08lx r9 : %08lx r8 : %08lx\n", + regs->ARM_r10, regs->ARM_r9, regs->ARM_r8); + printf ("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", + regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4); + printf ("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", + regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0); + printf ("Flags: %c%c%c%c", + flags & CC_N_BIT ? 'N' : 'n', + flags & CC_Z_BIT ? 'Z' : 'z', + flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v'); + printf (" IRQs %s FIQs %s Mode %s%s\n", + interrupts_enabled (regs) ? "on" : "off", + fast_interrupts_enabled (regs) ? "on" : "off", + processor_modes[processor_mode (regs)], + thumb_mode (regs) ? " (T)" : ""); +} + +void do_undefined_instruction (struct pt_regs *pt_regs) +{ + printf ("undefined instruction\n"); + show_regs (pt_regs); + bad_mode (); +} + +void do_software_interrupt (struct pt_regs *pt_regs) +{ + printf ("software interrupt\n"); + show_regs (pt_regs); + bad_mode (); +} + +void do_prefetch_abort (struct pt_regs *pt_regs) +{ + printf ("prefetch abort\n"); + show_regs (pt_regs); + bad_mode (); +} + +void do_data_abort (struct pt_regs *pt_regs) +{ + printf ("data abort\n"); + show_regs (pt_regs); + bad_mode (); +} + +void do_not_used (struct pt_regs *pt_regs) +{ + printf ("not used\n"); + show_regs (pt_regs); + bad_mode (); +} + +void do_fiq (struct pt_regs *pt_regs) +{ + printf ("fast interrupt request\n"); + show_regs (pt_regs); + bad_mode (); +} + +void do_irq (struct pt_regs *pt_regs) +{ + printf ("interrupt request\n"); + show_regs (pt_regs); + bad_mode (); +} diff -urN u-boot-1.1.6.org/cpu/arm922t/Makefile u-boot-1.1.6/cpu/arm922t/Makefile --- u-boot-1.1.6.org/cpu/arm922t/Makefile 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/Makefile 2006-11-02 22:15:02.000000000 +0800 @@ -0,0 +1,47 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.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 +# + +include $(TOPDIR)/config.mk + +LIB = $(obj)lib$(CPU).a + +START = start.o +COBJS = cpu.o interrupts.o + +SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS)) +START := $(addprefix $(obj),$(START)) + +all: $(obj).depend $(START) $(LIB) + +$(LIB): $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +####################################################################### ## + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +####################################################################### ## diff -urN u-boot-1.1.6.org/cpu/arm922t/start.S u-boot-1.1.6/cpu/arm922t/start.S --- u-boot-1.1.6.org/cpu/arm922t/start.S 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/cpu/arm922t/start.S 2006-11-30 10:25:41.000000000 +0800 @@ -0,0 +1,353 @@ +/* + * Copyright (C) 2006 Austriamicrosystems Corporation + * + * 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> + + +/* + ************************************************************************ * + * + * 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 + ldr pc, _not_used + 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 + + +/* + ************************************************************************ * + * + * Startup Code (reset vector) + * + * do important init only if we don't start from memory! + * relocate armboot to ram + * setup stack + * jump to second stage + * + ************************************************************************ * + */ + +RAM_END: + .word 0x50000 + +.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 _end+200 + +/* IRQ stack memory (calculated at run-time) */ +.globl FIQ_STACK_START +FIQ_STACK_START: + .word _end+400 +#endif + +/* + * the actual reset code + */ + +reset: + /* + * set the cpu to SVC32 mode + */ + mrs r0,cpsr + bic r0,r0,#0x1f + orr r0,r0,#0xd3 + msr cpsr,r0 + + /* + * we do sys-critical inits only at reboot, + * not when booting from ram! + */ +#ifndef CONFIG_SKIP_LOWLEVEL_INIT + bl cpu_init_crit +#endif + + /* Set up the stack */ +stack_setup: + ldr r0, RAM_END /* upper 128 KiB: relocated uboot */ + sub r0, r0, #CFG_MALLOC_LEN /* malloc area */ + sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */ + 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 + ldr r0,RAM_END + ldr r1,_bss_end + str r0,_armboot_start + add r1,r1,r0 + str r1,_bss_end + ldr r1,_bss_start + add r1,r1,r0 + str r1,_bss_start + ldr pc,_start_armboot + +_start_armboot: .word start_armboot + + +/* + ************************************************************************ * + * + * CPU_init_critical registers + * + * setup important registers + * setup memory timing + * + ************************************************************************ * + */ + + +#ifndef CONFIG_SKIP_LOWLEVEL_INIT +cpu_init_crit: + mrc p15, 0, r0, c1, c0, 0 @ read CP15 register 1 into r0 + bic r0, r0, #0x0001 @ clear bit 0 MMU disable + bic r0, r0, #0x0004 @ clear bit 2 D-cache disable + bic r0, r0, #0x1000 @ clear bit 12 I-cache disable + bic r0, r0, #0xc0000000 @ clear bit 30,31 fast bus mode + mcr p15, 0, r0, c1, c0, 0 @ write value back + + @ invalidate all caches to have a clean startup + mov r2, #0 + mcr p15, 0, r2, c7, c7, 0 @ Invalidate D- and I-Cache + mcr p15, 0, r2, c8, c7, 0 @ invalidate all TLBs + + + /* + * before relocating, we have to setup RAM timing + * because memory timing is board-dependend, you will + * find a lowlevel_init.S in your board directory. + */ + mov ip, lr + bl lowlevel_init + mov lr, ip + mov pc, lr +#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ + +/* + ************************************************************************ * + * + * 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 + ldr r2, _armboot_start + sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN) + sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack + ldmia r2, {r2 - r3} @ get pc, cpsr + add r0, sp, #S_FRAME_SIZE @ restore sp_SVC + + add r5, sp, #S_SP + mov r1, lr + stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr + 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+CFG_MALLOC_LEN) + sub r13, r13, #(CFG_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 + msr spsr, 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 diff -urN u-boot-1.1.6.org/CREDITS u-boot-1.1.6/CREDITS --- u-boot-1.1.6.org/CREDITS 2006-12-01 17:49:32.000000000 +0800 +++ u-boot-1.1.6/CREDITS 2006-11-30 10:30:13.000000000 +0800 @@ -465,3 +465,8 @@ E: james.macaulay@amirix.com D: Suppport for Amirix AP1000 W: www.amirix.com + +N: Thomas Luo +E: thomas.luo@austriamicrosystems.com +D: Port to ARM base SOC AS352X. +W: www.austriamicrosystems.com diff -urN u-boot-1.1.6.org/include/arm922t.h u-boot-1.1.6/include/arm922t.h --- u-boot-1.1.6.org/include/arm922t.h 1970-01-01 08:00:00.000000000 +0800 +++ u-boot-1.1.6/include/arm922t.h 2006-11-23 16:30:48.000000000 +0800 @@ -0,0 +1,12 @@ +/************************************************ + * NAME : arm922t.h + * Version : 30 April 2002 * + * + * empty for now + ************************************************/ + +#ifndef __ARM922T_H__ +#define __ARM922T_H__ + + +#endif /*__ARM922T_H__*/