diff options
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/at91rm9200/Makefile | 43 | ||||
| -rw-r--r-- | cpu/at91rm9200/config.mk | 27 | ||||
| -rw-r--r-- | cpu/at91rm9200/cpu.c | 177 | ||||
| -rw-r--r-- | cpu/at91rm9200/interrupts.c | 236 | ||||
| -rw-r--r-- | cpu/at91rm9200/serial.c | 89 | ||||
| -rw-r--r-- | cpu/at91rm9200/start.S | 347 | ||||
| -rw-r--r-- | cpu/mpc8xx/cpu_init.c | 6 | ||||
| -rw-r--r-- | cpu/sa1100/serial.c | 12 |
8 files changed, 930 insertions, 7 deletions
diff --git a/cpu/at91rm9200/Makefile b/cpu/at91rm9200/Makefile new file mode 100644 index 0000000..0953c9f --- /dev/null +++ b/cpu/at91rm9200/Makefile @@ -0,0 +1,43 @@ +# +# (C) Copyright 2003 +# 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 $(TOPDIR)/config.mk + +LIB = lib$(CPU).a + +START = start.o +OBJS = serial.o interrupts.o cpu.o + +all: .depend $(START) $(LIB) + +$(LIB): $(OBJS) + $(AR) crv $@ $(OBJS) + +######################################################################### + +.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c) + $(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@ + +sinclude .depend + +######################################################################### diff --git a/cpu/at91rm9200/config.mk b/cpu/at91rm9200/config.mk new file mode 100644 index 0000000..deb7f87 --- /dev/null +++ b/cpu/at91rm9200/config.mk @@ -0,0 +1,27 @@ +# +# (C) Copyright 2002 +# Sysgo Real-Time Solutions, GmbH <www.elinos.com> +# Marius Groeger <mgroeger@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 +# +PLATFORM_RELFLAGS += -fno-strict-aliasing -fno-common -ffixed-r8 \ + -mshort-load-bytes -msoft-float + +PLATFORM_CPPFLAGS += -mapcs-32 -march=armv4 -mtune=arm7tdmi diff --git a/cpu/at91rm9200/cpu.c b/cpu/at91rm9200/cpu.c new file mode 100644 index 0000000..f41210b --- /dev/null +++ b/cpu/at91rm9200/cpu.c @@ -0,0 +1,177 @@ +/* + * (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> + * + * 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 <AT91RM9200.h> + +/* 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"); + /*printf("p15/c1 is = %08lx\n", value); */ + return value; +} + +/* write to co-processor 15, register #1 (control register) */ +static void write_p15_c1(unsigned long value) +{ + /*printf("write %08lx to p15/c1\n", value); */ + __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 ARM Ref. Man. */ +#define C1_MMU (1<<0) /* mmu off/on */ +#define C1_ALIGN (1<<1) /* alignment faults off/on */ +#define C1_IDC (1<<2) /* icache and/or dcache off/on */ +#define C1_WRITE_BUFFER (1<<3) /* write buffer 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_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */ + +int cpu_init(void) +{ + /* + * setup up stack if necessary + */ +#ifdef CONFIG_USE_IRQ + IRQ_STACK_START = _armboot_end + + CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4; + FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ; + _armboot_real_end = FIQ_STACK_START + 4; +#else + _armboot_real_end = _armboot_end + CONFIG_STACKSIZE; +#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 ... + * and we set the CPU-speed to 73 MHz - see start.S for details + */ + + disable_interrupts(); + return 0; +} + +int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + +#ifdef CFG_SOFT_RESET + extern void reset_cpu(ulong addr); + + disable_interrupts(); + reset_cpu(0); +#else + AT91PS_USART us = AT91C_BASE_US1; + AT91PS_PIO pio = AT91C_BASE_PIOA; + + /*shutdown the console to avoid strange chars during reset */ + us->US_CR = (AT91C_US_RSTRX | AT91C_US_RSTTX); + + /* Clear PA19 to trigger the hard reset */ + pio->PIO_CODR = 0x00080000; + pio->PIO_OER = 0x00080000; + pio->PIO_PER = 0x00080000; + /* Never reached */ +#endif + return 0; +} + +void icache_enable(void) +{ + ulong reg; + reg = read_p15_c1(); + cp_delay(); + write_p15_c1(reg | C1_IDC); +} + +void icache_disable(void) +{ + ulong reg; + reg = read_p15_c1(); + cp_delay(); + write_p15_c1(reg & ~C1_IDC); +} + +int icache_status(void) +{ + return (read_p15_c1() & C1_IDC) != 0; + return 0; +} + +void dcache_enable(void) +{ + ulong reg; + reg = read_p15_c1(); + cp_delay(); + write_p15_c1(reg | C1_IDC); +} + +void dcache_disable(void) +{ + ulong reg; + reg = read_p15_c1(); + cp_delay(); + write_p15_c1(reg & ~C1_IDC); +} + +int dcache_status(void) +{ + return (read_p15_c1() & C1_IDC) != 0; + return 0; +} diff --git a/cpu/at91rm9200/interrupts.c b/cpu/at91rm9200/interrupts.c new file mode 100644 index 0000000..a14ef81 --- /dev/null +++ b/cpu/at91rm9200/interrupts.c @@ -0,0 +1,236 @@ +/* + * (C) Copyright 2002 + * Lineo, Inc. <www.lineo.com> + * Bernhard Kuhn <bkuhn@lineo.com> + * + * (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> + * + * 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 <AT91RM9200.h> +#include <asm/proc-armv/ptrace.h> + +extern void reset_cpu(ulong addr); + +/* we always count down the max. */ +#define TIMER_LOAD_VAL 0xffff + +/* macro to read the 16 bit timer */ +#define READ_TIMER (tmr->TC_CV) +AT91PS_TC tmr; + + + +void enable_interrupts (void) +{ + return; +} +int disable_interrupts (void) +{ + return 0; +} + + +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(); +} + +static ulong timestamp; +static ulong lastinc; + +int interrupt_init (void) +{ + + tmr = AT91C_BASE_TC0; + + /* enables TC1.0 clock */ + *AT91C_PMC_PCER = 1 << AT91C_ID_TC0; /* enable clock */ + + *AT91C_TCB0_BCR = 0; + *AT91C_TCB0_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_NONE | AT91C_TCB_TC2XC2S_NONE; + tmr->TC_CCR = AT91C_TC_CLKDIS; + tmr->TC_CMR = AT91C_TC_TIMER_DIV1_CLOCK; /* set to MCLK/2 */ + + tmr->TC_IDR = ~0ul; + tmr->TC_RC = TIMER_LOAD_VAL; + lastinc = TIMER_LOAD_VAL; + tmr->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN; + timestamp = 0; + return (0); +} + +/* + * timer without interrupts + */ + +void reset_timer(void) +{ + reset_timer_masked(); +} + +ulong get_timer (ulong base) +{ + return get_timer_masked() - base; +} + +void set_timer (ulong t) +{ + timestamp = t; +} + +void udelay(unsigned long usec) +{ + udelay_masked(usec); +} + +void reset_timer_masked(void) +{ + /* reset time */ + lastinc = READ_TIMER; + timestamp = 0; +} + +ulong get_timer_masked(void) +{ + ulong now = READ_TIMER; + if (now >= lastinc) + { + /* normal mode */ + timestamp += now - lastinc; + } else { + /* we have an overflow ... */ + timestamp += now + TIMER_LOAD_VAL - lastinc; + } + lastinc = now; + + return timestamp; +} + +void udelay_masked(unsigned long usec) +{ + ulong tmo; + + tmo = usec / 1000; + tmo *= CFG_HZ; + tmo /= 1000; + + reset_timer_masked(); + + while(get_timer_masked() < tmo); + /*NOP*/; +} + + diff --git a/cpu/at91rm9200/serial.c b/cpu/at91rm9200/serial.c new file mode 100644 index 0000000..565cd3d --- /dev/null +++ b/cpu/at91rm9200/serial.c @@ -0,0 +1,89 @@ +/* + * (C) Copyright 2002 + * Lineo, Inc <www.lineo.com> + * Bernhard Kuhn <bkuhn@lineo.com> + * + * (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> + * + * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) + * + * 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 <AT91RM9200.h> + +/* ggi thunder */ +AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU; + +void serial_setbrg(void) + { + DECLARE_GLOBAL_DATA_PTR; + int baudrate; + + if ((baudrate = gd->bd->bi_baudrate) <= 0) + baudrate = CONFIG_BAUDRATE; + us->US_BRGR = 33 /* AT91C_MASTER_CLOCK / baudrate / 16 */; /* hardcode so no __divsi3 */ + } + +int serial_init(void) + { + /* make any port initializations specific to this port */ + *AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD; /* PA 31 & 30 */ + *AT91C_PMC_PCER = 1 << AT91C_ID_SYS; /* enable clock */ + serial_setbrg(); + + us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX; + us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN; + us->US_MR = ( AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS | AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT ); + us->US_IMR = ~0ul; + return (0); + } + +void serial_putc(const char c) + { + if (c == '\n') + serial_putc('\r'); + while( (us->US_CSR & AT91C_US_TXRDY) == 0 ) + ; + us->US_THR=c; + } + +void +serial_puts (const char *s) + { + while (*s) + { + serial_putc (*s++); + } + } + +int serial_getc(void) + { + while( (us->US_CSR & AT91C_US_RXRDY) == 0 ); + return us->US_RHR; + } + +int serial_tstc(void) + { + return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY); + } diff --git a/cpu/at91rm9200/start.S b/cpu/at91rm9200/start.S new file mode 100644 index 0000000..9b3e7aa --- /dev/null +++ b/cpu/at91rm9200/start.S @@ -0,0 +1,347 @@ +/* + * armboot - Startup Code for ARM720 CPU-core + * + * Copyright (c) 2001 Marius Gröger <mag@sysgo.de> + * Copyright (c) 2002 Alex Züpke <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 + */ + + + +#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 + * + ************************************************************************* + */ + +/* + * CFG_MEM_END is in the board dependent config-file (configs/config_BOARD.h) + */ +_TEXT_BASE: + .word TEXT_BASE + +.globl _armboot_start +_armboot_start: + .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 + */ +.globl _armboot_end_data +_armboot_end_data: + .word armboot_end_data +/* + * Note: armboot_end is defined by the (board-dependent) linker script + */ +.globl _armboot_end +_armboot_end: + .word armboot_end + +/* + * _armboot_real_end is the first usable RAM address behind armboot + * and the various stacks + */ +.globl _armboot_real_end +_armboot_real_end: + .word 0x0badc0de + +#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 + */ + +reset: + /* + * set the cpu to SVC32 mode + */ + mrs r0,cpsr + bic r0,r0,#0x1f + orr r0,r0,#0x13 + msr cpsr,r0 + + /* + * relocate exeception table + */ + ldr r0, =_start + ldr r1, =0x0 + mov r2, #16 +copyex: + subs r2, r2, #1 + ldr r3, [r0], #4 + str r3, [r1], #4 + bne copyex + + /* + * we do sys-critical inits only at reboot, + * not when booting from ram! + */ +#ifdef CONFIG_INIT_CRITICAL + bl cpu_init_crit +#endif + + /* set up the stack */ + ldr r0, _armboot_end + add r0, r0, #CONFIG_STACKSIZE + sub sp, r0, #12 /* leave 3 words for abort-stack */ + ldr pc,_start_armboot + +_start_armboot: .word start_armboot + +/* + ************************************************************************* + * + * CPU_init_critical registers + * + ************************************************************************* + */ + +cpu_init_crit: + # actually do nothing for now! + 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_end + add r2, r2, #CONFIG_STACKSIZE + sub r2, r2, #8 + 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_end @ setup our mode stack + add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack + sub r13, r13, #8 + + 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 + + .align 5 +.globl reset_cpu +reset_cpu: + mov pc, r0 diff --git a/cpu/mpc8xx/cpu_init.c b/cpu/mpc8xx/cpu_init.c index 4bd91f9..83ff66a 100644 --- a/cpu/mpc8xx/cpu_init.c +++ b/cpu/mpc8xx/cpu_init.c @@ -54,9 +54,11 @@ void cpu_init_f (volatile immap_t * immr) #endif /* CONFIG_WATCHDOG */ /* SIUMCR - contains debug pin configuration (11-6) */ - +#ifndef CONFIG_SVM_SC8xx immr->im_siu_conf.sc_siumcr |= CFG_SIUMCR; - +#else + immr->im_siu_conf.sc_siumcr = CFG_SIUMCR; +#endif /* initialize timebase status and control register (11-26) */ /* unlock TBSCRK */ diff --git a/cpu/sa1100/serial.c b/cpu/sa1100/serial.c index 68bcd1f..d3b8628 100644 --- a/cpu/sa1100/serial.c +++ b/cpu/sa1100/serial.c @@ -53,17 +53,19 @@ void serial_setbrg (void) hang (); #ifdef CONFIG_SERIAL1 + /* SA1110 uart function */ + Ser1SDCR0 |= SDCR0_SUS; + /* Wait until port is ready ... */ - while (Ser1UTSR1 & UTSR1_TBY) { - } + while(Ser1UTSR1 & UTSR1_TBY) {} /* init serial serial 1 */ Ser1UTCR3 = 0x00; Ser1UTSR0 = 0xff; - Ser1UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData); + Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData ); Ser1UTCR1 = 0; - Ser1UTCR2 = (u32) reg; - Ser1UTCR3 = (UTCR3_RXE | UTCR3_TXE); + Ser1UTCR2 = (u32)reg; + Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE ); #elif CONFIG_SERIAL3 /* Wait until port is ready ... */ while (Ser3UTSR1 & UTSR1_TBY) { |