| /* |
| * Copyright 2008-2010 Freescale Semiconductor, Inc. |
| * |
| * 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 <lmb.h> |
| #include <asm/io.h> |
| #include <asm/mmu.h> |
| #include <asm/fsl_law.h> |
| #include "mp.h" |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| u32 get_my_id() |
| { |
| return mfspr(SPRN_PIR); |
| } |
| |
| int cpu_reset(int nr) |
| { |
| volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR); |
| out_be32(&pic->pir, 1 << nr); |
| /* the dummy read works around an errata on early 85xx MP PICs */ |
| (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_virt_addr(); |
| printf("table base @ 0x%p\n", table); |
| } else { |
| table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY; |
| printf("Running on cpu %d\n", id); |
| printf("\n"); |
| printf("table @ 0x%p\n", table); |
| printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]); |
| printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]); |
| printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]); |
| printf(" r6 - 0x%08x\n", table[BOOT_ENTRY_R6_LOWER]); |
| } |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_FSL_CORENET |
| int cpu_disable(int nr) |
| { |
| volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); |
| |
| setbits_be32(&gur->coredisrl, 1 << nr); |
| |
| return 0; |
| } |
| #else |
| int cpu_disable(int nr) |
| { |
| volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); |
| |
| switch (nr) { |
| case 0: |
| setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0); |
| break; |
| case 1: |
| setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1); |
| break; |
| default: |
| printf("Invalid cpu number for disable %d\n", nr); |
| return 1; |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| static u8 boot_entry_map[4] = { |
| 0, |
| BOOT_ENTRY_PIR, |
| BOOT_ENTRY_R3_LOWER, |
| BOOT_ENTRY_R6_LOWER, |
| }; |
| |
| int cpu_release(int nr, int argc, char * const argv[]) |
| { |
| u32 i, val, *table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY; |
| u64 boot_addr; |
| |
| if (nr == get_my_id()) { |
| printf("Invalid to release the boot core.\n\n"); |
| return 1; |
| } |
| |
| if (argc != 4) { |
| printf("Invalid number of arguments to release.\n\n"); |
| return 1; |
| } |
| |
| boot_addr = simple_strtoull(argv[0], NULL, 16); |
| |
| /* handle pir, r3, r6 */ |
| for (i = 1; i < 4; i++) { |
| if (argv[i][0] != '-') { |
| u8 entry = boot_entry_map[i]; |
| val = simple_strtoul(argv[i], NULL, 16); |
| table[entry] = val; |
| } |
| } |
| |
| table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32); |
| |
| /* ensure all table updates complete before final address write */ |
| eieio(); |
| |
| table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff); |
| |
| return 0; |
| } |
| |
| u32 determine_mp_bootpg(void) |
| { |
| /* if we have 4G or more of memory, put the boot page at 4Gb-4k */ |
| if ((u64)gd->ram_size > 0xfffff000) |
| return (0xfffff000); |
| |
| return (gd->ram_size - 4096); |
| } |
| |
| ulong get_spin_phys_addr(void) |
| { |
| extern ulong __secondary_start_page; |
| extern ulong __spin_table; |
| |
| return (determine_mp_bootpg() + |
| (ulong)&__spin_table - (ulong)&__secondary_start_page); |
| } |
| |
| ulong get_spin_virt_addr(void) |
| { |
| extern ulong __secondary_start_page; |
| extern ulong __spin_table; |
| |
| return (CONFIG_BPTR_VIRT_ADDR + |
| (ulong)&__spin_table - (ulong)&__secondary_start_page); |
| } |
| |
| #ifdef CONFIG_FSL_CORENET |
| static void plat_mp_up(unsigned long bootpg) |
| { |
| u32 up, cpu_up_mask, whoami; |
| u32 *table = (u32 *)get_spin_virt_addr(); |
| volatile ccsr_gur_t *gur; |
| volatile ccsr_local_t *ccm; |
| volatile ccsr_rcpm_t *rcpm; |
| volatile ccsr_pic_t *pic; |
| int timeout = 10; |
| u32 nr_cpus; |
| struct law_entry e; |
| |
| gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); |
| ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR); |
| rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR); |
| pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR); |
| |
| nr_cpus = ((in_be32(&pic->frr) >> 8) & 0xff) + 1; |
| |
| whoami = in_be32(&pic->whoami); |
| cpu_up_mask = 1 << whoami; |
| out_be32(&ccm->bstrl, bootpg); |
| |
| e = find_law(bootpg); |
| out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | LAW_SIZE_4K); |
| |
| /* readback to sync write */ |
| in_be32(&ccm->bstrar); |
| |
| /* disable time base at the platform */ |
| out_be32(&rcpm->ctbenrl, cpu_up_mask); |
| |
| /* release the hounds */ |
| up = ((1 << nr_cpus) - 1); |
| out_be32(&gur->brrl, up); |
| |
| /* wait for everyone */ |
| while (timeout) { |
| int i; |
| for (i = 0; i < nr_cpus; i++) { |
| if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER]) |
| cpu_up_mask |= (1 << i); |
| }; |
| |
| if ((cpu_up_mask & up) == up) |
| break; |
| |
| udelay(100); |
| timeout--; |
| } |
| |
| if (timeout == 0) |
| printf("CPU up timeout. CPU up mask is %x should be %x\n", |
| cpu_up_mask, up); |
| |
| /* enable time base at the platform */ |
| out_be32(&rcpm->ctbenrl, 0); |
| mtspr(SPRN_TBWU, 0); |
| mtspr(SPRN_TBWL, 0); |
| out_be32(&rcpm->ctbenrl, (1 << nr_cpus) - 1); |
| |
| #ifdef CONFIG_MPC8xxx_DISABLE_BPTR |
| /* |
| * Disabling Boot Page Translation allows the memory region 0xfffff000 |
| * to 0xffffffff to be used normally. Leaving Boot Page Translation |
| * enabled remaps 0xfffff000 to SDRAM which makes that memory region |
| * unusable for normal operation but it does allow OSes to easily |
| * reset a processor core to put it back into U-Boot's spinloop. |
| */ |
| clrbits_be32(&ecm->bptr, 0x80000000); |
| #endif |
| } |
| #else |
| static void plat_mp_up(unsigned long bootpg) |
| { |
| u32 up, cpu_up_mask, whoami; |
| u32 *table = (u32 *)get_spin_virt_addr(); |
| volatile u32 bpcr; |
| volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR); |
| volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); |
| volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_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 << cpu_numcores()) - 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 = 0; i < cpu_numcores(); i++) { |
| if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER]) |
| cpu_up_mask |= (1 << i); |
| }; |
| |
| if ((cpu_up_mask & up) == up) |
| break; |
| |
| udelay(100); |
| timeout--; |
| } |
| |
| if (timeout == 0) |
| printf("CPU up timeout. CPU up mask is %x should be %x\n", |
| cpu_up_mask, up); |
| |
| /* 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); |
| |
| #ifdef CONFIG_MPC8xxx_DISABLE_BPTR |
| /* |
| * Disabling Boot Page Translation allows the memory region 0xfffff000 |
| * to 0xffffffff to be used normally. Leaving Boot Page Translation |
| * enabled remaps 0xfffff000 to SDRAM which makes that memory region |
| * unusable for normal operation but it does allow OSes to easily |
| * reset a processor core to put it back into U-Boot's spinloop. |
| */ |
| clrbits_be32(&ecm->bptr, 0x80000000); |
| #endif |
| } |
| #endif |
| |
| void cpu_mp_lmb_reserve(struct lmb *lmb) |
| { |
| u32 bootpg = determine_mp_bootpg(); |
| |
| lmb_reserve(lmb, bootpg, 4096); |
| } |
| |
| void setup_mp(void) |
| { |
| extern ulong __secondary_start_page; |
| extern ulong __bootpg_addr; |
| ulong fixup = (ulong)&__secondary_start_page; |
| u32 bootpg = determine_mp_bootpg(); |
| |
| /* Store the bootpg's SDRAM address for use by secondary CPU cores */ |
| __bootpg_addr = bootpg; |
| |
| /* look for the tlb covering the reset page, there better be one */ |
| int i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1); |
| |
| /* we found a match */ |
| if (i != -1) { |
| /* map reset page to bootpg so we can copy code there */ |
| disable_tlb(i); |
| |
| set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */ |
| MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */ |
| 0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */ |
| |
| memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096); |
| |
| plat_mp_up(bootpg); |
| } else { |
| puts("WARNING: No reset page TLB. " |
| "Skipping secondary core setup\n"); |
| } |
| } |