diff options
Diffstat (limited to 'cpu/mpc85xx/mp.c')
| -rw-r--r-- | cpu/mpc85xx/mp.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/cpu/mpc85xx/mp.c b/cpu/mpc85xx/mp.c new file mode 100644 index 000000000..aa91cea17 --- /dev/null +++ b/cpu/mpc85xx/mp.c @@ -0,0 +1,190 @@ +/* + * Copyright 2008 Freescale Semiconductor. + * + * 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 <asm/processor.h> +#include <ioports.h> +#include <asm/io.h> +#include "mp.h" + +DECLARE_GLOBAL_DATA_PTR; + +#define BOOT_ENTRY_ADDR 0 +#define BOOT_ENTRY_PIR 1 +#define BOOT_ENTRY_R3 2 +#define BOOT_ENTRY_R4 3 +#define BOOT_ENTRY_R6 4 +#define BOOT_ENTRY_R7 5 +#define NUM_BOOT_ENTRY 6 + +u32 get_my_id() +{ + return mfspr(SPRN_PIR); +} + +int cpu_reset(int nr) +{ + volatile ccsr_pic_t *pic = (void *)(CFG_MPC85xx_PIC_ADDR); + out_be32(&pic->pir, 1 << nr); + (void)in_be32(&pic->pir); + out_be32(&pic->pir, 0x0); + + return 0; +} + +int cpu_status(int nr) +{ + u32 *table, id = get_my_id(); + + if (nr == id) { + table = (u32 *)get_spin_addr(); + printf("table base @ 0x%08x\n", table); + } else { + table = (u32 *)get_spin_addr() + nr * NUM_BOOT_ENTRY; + printf("Running on cpu %d\n", id); + printf("\n"); + printf("table @ 0x%08x:\n", table); + printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR]); + printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]); + printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3]); + printf(" r4 - 0x%08x\n", table[BOOT_ENTRY_R4]); + printf(" r6 - 0x%08x\n", table[BOOT_ENTRY_R6]); + printf(" r7 - 0x%08x\n", table[BOOT_ENTRY_R7]); + } + + return 0; +} + +int cpu_release(int nr, unsigned long boot_addr, int argc, char *argv[]) +{ + u32 i, val, *table = (u32 *)get_spin_addr() + nr * NUM_BOOT_ENTRY; + + if (nr == get_my_id()) { + printf("Invalid to release the boot core.\n\n"); + return 1; + } + + if (argc != 5) { + printf("Invalid number of arguments to release.\n\n"); + return 1; + } + + /* handle pir, r3, r4, r6, r7 */ + for (i = 0; i < 5; i++) { + if (argv[i][0] != '-') { + val = simple_strtoul(argv[i], NULL, 16); + table[i+BOOT_ENTRY_PIR] = val; + } + } + + table[BOOT_ENTRY_ADDR] = boot_addr; + + return 0; +} + +ulong get_spin_addr(void) +{ + extern ulong __secondary_start_page; + extern ulong __spin_table; + + ulong addr = + (ulong)&__spin_table - (ulong)&__secondary_start_page; + addr += 0xfffff000; + + return addr; +} + +static void pq3_mp_up(unsigned long bootpg) +{ + u32 up, cpu_up_mask, whoami; + u32 *table = (u32 *)get_spin_addr(); + volatile u32 bpcr; + volatile ccsr_local_ecm_t *ecm = (void *)(CFG_MPC85xx_ECM_ADDR); + volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR); + volatile ccsr_pic_t *pic = (void *)(CFG_MPC85xx_PIC_ADDR); + u32 devdisr; + int timeout = 10; + + whoami = in_be32(&pic->whoami); + out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12)); + + /* disable time base at the platform */ + devdisr = in_be32(&gur->devdisr); + if (whoami) + devdisr |= MPC85xx_DEVDISR_TB0; + else + devdisr |= MPC85xx_DEVDISR_TB1; + out_be32(&gur->devdisr, devdisr); + + /* release the hounds */ + up = ((1 << CONFIG_NR_CPUS) - 1); + bpcr = in_be32(&ecm->eebpcr); + bpcr |= (up << 24); + out_be32(&ecm->eebpcr, bpcr); + asm("sync; isync; msync"); + + cpu_up_mask = 1 << whoami; + /* wait for everyone */ + while (timeout) { + int i; + for (i = 1; i < CONFIG_NR_CPUS; i++) { + if (table[i * NUM_BOOT_ENTRY]) + cpu_up_mask |= (1 << i); + }; + + if ((cpu_up_mask & up) == up) + break; + + udelay(100); + timeout--; + } + + /* enable time base at the platform */ + if (whoami) + devdisr |= MPC85xx_DEVDISR_TB1; + else + devdisr |= MPC85xx_DEVDISR_TB0; + out_be32(&gur->devdisr, devdisr); + mtspr(SPRN_TBWU, 0); + mtspr(SPRN_TBWL, 0); + + devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1); + out_be32(&gur->devdisr, devdisr); +} + +void setup_mp(void) +{ + extern ulong __secondary_start_page; + ulong fixup = (ulong)&__secondary_start_page; + u32 bootpg; + + /* if we have 4G or more of memory, put the boot page at 4Gb-4k */ + if ((u64)gd->ram_size > 0xfffff000) + bootpg = 0xfffff000; + else + bootpg = gd->ram_size - 4096; + + memcpy((void *)bootpg, (void *)fixup, 4096); + flush_cache(bootpg, 4096); + + pq3_mp_up(bootpg); +} |