X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fpowerpc%2Fcpu%2Fmpc85xx%2Fmp.c;h=88c8e65930e6918002fd8495fb4dc9644f704e53;hb=a53dd530013bba81ad6ba87a661ff19b12977c23;hp=826bf32d4d53567491fe75ff7837a30116c3699c;hpb=9d62f20d0861ef87460d073dc189c851715b46ae;p=u-boot diff --git a/arch/powerpc/cpu/mpc85xx/mp.c b/arch/powerpc/cpu/mpc85xx/mp.c index 826bf32d4d..88c8e65930 100644 --- a/arch/powerpc/cpu/mpc85xx/mp.c +++ b/arch/powerpc/cpu/mpc85xx/mp.c @@ -1,23 +1,7 @@ /* - * Copyright 2008-2010 Freescale Semiconductor, Inc. + * Copyright 2008-2011 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 + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -27,18 +11,41 @@ #include #include #include +#include #include "mp.h" DECLARE_GLOBAL_DATA_PTR; +u32 fsl_ddr_get_intl3r(void); + +extern u32 __spin_table[]; u32 get_my_id() { return mfspr(SPRN_PIR); } +/* + * Determine if U-Boot should keep secondary cores in reset, or let them out + * of reset and hold them in a spinloop + */ +int hold_cores_in_reset(int verbose) +{ + /* Default to no, overriden by 'y', 'yes', 'Y', 'Yes', or '1' */ + if (getenv_yesno("mp_holdoff") == 1) { + if (verbose) { + puts("Secondary cores are being held in reset.\n"); + puts("See 'mp_holdoff' environment variable\n"); + } + + return 1; + } + + return 0; +} + int cpu_reset(int nr) { - volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC85xx_PIC_ADDR); + volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_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); @@ -51,18 +58,22 @@ int cpu_status(int nr) { u32 *table, id = get_my_id(); + if (hold_cores_in_reset(1)) + return 0; + if (nr == id) { - table = (u32 *)get_spin_virt_addr(); + table = (u32 *)&__spin_table; printf("table base @ 0x%p\n", table); + } else if (is_core_disabled(nr)) { + puts("Disabled\n"); } else { - table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY; + table = (u32 *)&__spin_table + 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]); + printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]); } return 0; @@ -77,6 +88,13 @@ int cpu_disable(int nr) return 0; } + +int is_core_disabled(int nr) { + ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); + u32 coredisrl = in_be32(&gur->coredisrl); + + return (coredisrl & (1 << nr)); +} #else int cpu_disable(int nr) { @@ -96,20 +114,38 @@ int cpu_disable(int nr) return 0; } + +int is_core_disabled(int nr) { + ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); + u32 devdisr = in_be32(&gur->devdisr); + + switch (nr) { + case 0: + return (devdisr & MPC85xx_DEVDISR_CPU0); + case 1: + return (devdisr & MPC85xx_DEVDISR_CPU1); + default: + printf("Invalid cpu number for disable %d\n", nr); + } + + 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 *argv[]) +int cpu_release(int nr, int argc, char * const argv[]) { - u32 i, val, *table = (u32 *)get_spin_virt_addr() + nr * NUM_BOOT_ENTRY; + u32 i, val, *table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY; u64 boot_addr; + if (hold_cores_in_reset(1)) + return 0; + if (nr == get_my_id()) { printf("Invalid to release the boot core.\n\n"); return 1; @@ -122,8 +158,8 @@ int cpu_release(int nr, int argc, char *argv[]) boot_addr = simple_strtoull(argv[0], NULL, 16); - /* handle pir, r3, r6 */ - for (i = 1; i < 4; i++) { + /* handle pir, r3 */ + for (i = 1; i < 3; i++) { if (argv[i][0] != '-') { u8 entry = boot_entry_map[i]; val = simple_strtoul(argv[i], NULL, 16); @@ -141,59 +177,103 @@ int cpu_release(int nr, int argc, char *argv[]) return 0; } -u32 determine_mp_bootpg(void) +u32 determine_mp_bootpg(unsigned int *pagesize) { - /* if we have 4G or more of memory, put the boot page at 4Gb-4k */ - if ((u64)gd->ram_size > 0xfffff000) - return (0xfffff000); + u32 bootpg; +#ifdef CONFIG_SYS_FSL_ERRATUM_A004468 + u32 svr = get_svr(); + u32 granule_size, check; + struct law_entry e; +#endif - return (gd->ram_size - 4096); -} -ulong get_spin_phys_addr(void) -{ - extern ulong __secondary_start_page; - extern ulong __spin_table; + /* use last 4K of mapped memory */ + bootpg = ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ? + CONFIG_MAX_MEM_MAPPED : gd->ram_size) + + CONFIG_SYS_SDRAM_BASE - 4096; + if (pagesize) + *pagesize = 4096; + +#ifdef CONFIG_SYS_FSL_ERRATUM_A004468 +/* + * Erratum A004468 has two parts. The 3-way interleaving applies to T4240, + * to be fixed in rev 2.0. The 2-way interleaving applies to many SoCs. But + * the way boot page chosen in u-boot avoids hitting this erratum. So only + * thw workaround for 3-way interleaving is needed. + * + * To make sure boot page translation works with 3-Way DDR interleaving + * enforce a check for the following constrains + * 8K granule size requires BRSIZE=8K and + * bootpg >> log2(BRSIZE) %3 == 1 + * 4K and 1K granule size requires BRSIZE=4K and + * bootpg >> log2(BRSIZE) %3 == 0 + */ + if (SVR_SOC_VER(svr) == SVR_T4240 && SVR_MAJ(svr) < 2) { + e = find_law(bootpg); + switch (e.trgt_id) { + case LAW_TRGT_IF_DDR_INTLV_123: + granule_size = fsl_ddr_get_intl3r() & 0x1f; + if (granule_size == FSL_DDR_3WAY_8KB_INTERLEAVING) { + if (pagesize) + *pagesize = 8192; + bootpg &= 0xffffe000; /* align to 8KB */ + check = bootpg >> 13; + while ((check % 3) != 1) + check--; + bootpg = check << 13; + debug("Boot page (8K) at 0x%08x\n", bootpg); + break; + } else { + bootpg &= 0xfffff000; /* align to 4KB */ + check = bootpg >> 12; + while ((check % 3) != 0) + check--; + bootpg = check << 12; + debug("Boot page (4K) at 0x%08x\n", bootpg); + } + break; + default: + break; + } + } +#endif /* CONFIG_SYS_FSL_ERRATUM_A004468 */ - return (determine_mp_bootpg() + - (ulong)&__spin_table - (ulong)&__secondary_start_page); + return bootpg; } -ulong get_spin_virt_addr(void) +phys_addr_t get_spin_phys_addr(void) { - extern ulong __secondary_start_page; - extern ulong __spin_table; - - return (CONFIG_BPTR_VIRT_ADDR + - (ulong)&__spin_table - (ulong)&__secondary_start_page); + return virt_to_phys(&__spin_table); } #ifdef CONFIG_FSL_CORENET -static void plat_mp_up(unsigned long bootpg) +static void plat_mp_up(unsigned long bootpg, unsigned int pagesize) { - u32 up, cpu_up_mask, whoami; - u32 *table = (u32 *)get_spin_virt_addr(); + u32 cpu_up_mask, whoami, brsize = LAW_SIZE_4K; + u32 *table = (u32 *)&__spin_table; 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; + u32 mask = cpu_mask(); 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; + pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR); 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); + /* pagesize is only 4K or 8K */ + if (pagesize == 8192) + brsize = LAW_SIZE_8K; + out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | brsize); + debug("BRSIZE is 0x%x\n", brsize); /* readback to sync write */ in_be32(&ccm->bstrar); @@ -201,19 +281,18 @@ static void plat_mp_up(unsigned long bootpg) /* 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); + out_be32(&gur->brrl, mask); /* 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); - }; + unsigned int i, cpu, nr_cpus = cpu_numcores(); - if ((cpu_up_mask & up) == up) + for_each_cpu(i, cpu, nr_cpus, mask) { + if (table[cpu * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER]) + cpu_up_mask |= (1 << cpu); + } + + if ((cpu_up_mask & mask) == mask) break; udelay(100); @@ -222,13 +301,18 @@ static void plat_mp_up(unsigned long bootpg) if (timeout == 0) printf("CPU up timeout. CPU up mask is %x should be %x\n", - cpu_up_mask, up); + cpu_up_mask, mask); /* enable time base at the platform */ out_be32(&rcpm->ctbenrl, 0); + + /* readback to sync write */ + in_be32(&rcpm->ctbenrl); + mtspr(SPRN_TBWU, 0); mtspr(SPRN_TBWL, 0); - out_be32(&rcpm->ctbenrl, (1 << nr_cpus) - 1); + + out_be32(&rcpm->ctbenrl, mask); #ifdef CONFIG_MPC8xxx_DISABLE_BPTR /* @@ -238,18 +322,18 @@ static void plat_mp_up(unsigned long bootpg) * 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); + clrbits_be32(&ccm->bstrar, LAW_EN); #endif } #else -static void plat_mp_up(unsigned long bootpg) +static void plat_mp_up(unsigned long bootpg, unsigned int pagesize) { u32 up, cpu_up_mask, whoami; - u32 *table = (u32 *)get_spin_virt_addr(); + u32 *table = (u32 *)&__spin_table; 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); + volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR); u32 devdisr; int timeout = 10; @@ -297,6 +381,10 @@ static void plat_mp_up(unsigned long bootpg) else devdisr |= MPC85xx_DEVDISR_TB0; out_be32(&gur->devdisr, devdisr); + + /* readback to sync write */ + in_be32(&gur->devdisr); + mtspr(SPRN_TBWU, 0); mtspr(SPRN_TBWL, 0); @@ -318,23 +406,52 @@ static void plat_mp_up(unsigned long bootpg) void cpu_mp_lmb_reserve(struct lmb *lmb) { - u32 bootpg = determine_mp_bootpg(); + u32 bootpg = determine_mp_bootpg(NULL); 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(); + extern u32 __secondary_start_page; + extern u32 __bootpg_addr, __spin_table_addr, __second_half_boot_page; + + int i; + ulong fixup = (u32)&__secondary_start_page; + u32 bootpg, bootpg_map, pagesize; + + bootpg = determine_mp_bootpg(&pagesize); + + /* + * pagesize is only 4K or 8K + * we only use the last 4K of boot page + * bootpg_map saves the address for the boot page + * 8K is used for the workaround of 3-way DDR interleaving + */ + + bootpg_map = bootpg; + + if (pagesize == 8192) + bootpg += 4096; /* use 2nd half */ + + /* Some OSes expect secondary cores to be held in reset */ + if (hold_cores_in_reset(0)) + return; + + /* + * Store the bootpg's cache-able half address for use by secondary + * CPU cores to continue to boot + */ + __bootpg_addr = (u32)virt_to_phys(&__second_half_boot_page); + + /* Store spin table's physical address for use by secondary cores */ + __spin_table_addr = (u32)get_spin_phys_addr(); - /* Store the bootpg's SDRAM address for use by secondary CPU cores */ - __bootpg_addr = bootpg; + /* flush bootpg it before copying invalidate any staled cacheline */ + flush_cache(bootpg, 4096); /* look for the tlb covering the reset page, there better be one */ - int i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1); + i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1); /* we found a match */ if (i != -1) { @@ -347,7 +464,7 @@ void setup_mp(void) memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096); - plat_mp_up(bootpg); + plat_mp_up(bootpg_map, pagesize); } else { puts("WARNING: No reset page TLB. " "Skipping secondary core setup\n");