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Diffstat (limited to 'cpu/at91rm9200/cpu.c')
| -rw-r--r-- | cpu/at91rm9200/cpu.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/cpu/at91rm9200/cpu.c b/cpu/at91rm9200/cpu.c deleted file mode 100644 index 9fdb703..0000000 --- a/cpu/at91rm9200/cpu.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * (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 <asm/io.h> -#include <asm/arch/hardware.h> - -#if !defined(CONFIG_DBGU) && !defined(CONFIG_USART0) && !defined(CONFIG_USART1) -#error must define one of CONFIG_DBGU or CONFIG_USART0 or CONFIG_USART1 -#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"); - /*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 stacks if necessary - */ -#ifdef CONFIG_USE_IRQ - DECLARE_GLOBAL_DATA_PTR; - - 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 ... - * 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 - disable_interrupts(); - reset_cpu(0); -#else -#ifdef CONFIG_DBGU - AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU; -#endif -#ifdef CONFIG_USART0 - AT91PS_USART us = AT91C_BASE_US0; -#endif -#ifdef CONFIG_USART1 - AT91PS_USART us = AT91C_BASE_US1; -#endif - AT91PS_PIO pio = AT91C_BASE_PIOA; - - /*shutdown the console to avoid strange chars during reset */ - us->US_CR = (AT91C_US_RSTRX | AT91C_US_RSTTX); - -#ifdef CONFIG_AT91RM9200DK - /* Clear PA19 to trigger the hard reset */ - pio->PIO_CODR = 0x00080000; - pio->PIO_OER = 0x00080000; - pio->PIO_PER = 0x00080000; -#endif -#ifdef CONFIG_CMC_PU2 -/* this is the way Linux does it */ -#define AT91C_ST_RSTEN (0x1 << 16) -#define AT91C_ST_EXTEN (0x1 << 17) -#define AT91C_ST_WDRST (0x1 << 0) -/* watchdog mode register */ -#define ST_WDMR *((unsigned long *)0xfffffd08) -/* system clock control register */ -#define ST_CR *((unsigned long *)0xfffffd00) - ST_WDMR = AT91C_ST_RSTEN | AT91C_ST_EXTEN | 1 ; - ST_CR = AT91C_ST_WDRST; - /* Never reached */ -#endif -#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; -} |