diff options
Diffstat (limited to 'roms/u-boot/arch/powerpc/cpu/mpc85xx/mp.c')
-rw-r--r-- | roms/u-boot/arch/powerpc/cpu/mpc85xx/mp.c | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/roms/u-boot/arch/powerpc/cpu/mpc85xx/mp.c b/roms/u-boot/arch/powerpc/cpu/mpc85xx/mp.c new file mode 100644 index 000000000..653efe09f --- /dev/null +++ b/roms/u-boot/arch/powerpc/cpu/mpc85xx/mp.c @@ -0,0 +1,477 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2008-2011 Freescale Semiconductor, Inc. + */ + +#include <common.h> +#include <cpu_func.h> +#include <env.h> +#include <log.h> +#include <asm/global_data.h> +#include <asm/processor.h> +#include <env.h> +#include <ioports.h> +#include <lmb.h> +#include <asm/io.h> +#include <asm/mmu.h> +#include <asm/fsl_law.h> +#include <fsl_ddr_sdram.h> +#include <linux/delay.h> +#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, overridden by 'y', 'yes', 'Y', 'Yes', or '1' */ + if (env_get_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(u32 nr) +{ + 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); + out_be32(&pic->pir, 0x0); + + return 0; +} + +int cpu_status(u32 nr) +{ + u32 *table, id = get_my_id(); + + if (hold_cores_in_reset(1)) + return 0; + + if (nr == id) { + table = (u32 *)&__spin_table; + printf("table base @ 0x%p\n", table); + } else if (is_core_disabled(nr)) { + puts("Disabled\n"); + } else { + 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(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]); + printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]); + } + + return 0; +} + +#ifdef CONFIG_FSL_CORENET +int cpu_disable(u32 nr) +{ + volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR); + + setbits_be32(&gur->coredisrl, 1 << 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(u32 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; +} + +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, +}; + +int cpu_release(u32 nr, int argc, char *const argv[]) +{ + 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; + } + + 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 */ + for (i = 1; i < 3; 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(unsigned int *pagesize) +{ + u32 bootpg; +#ifdef CONFIG_SYS_FSL_ERRATUM_A004468 + u32 svr = get_svr(); + u32 granule_size, check; + struct law_entry e; +#endif + + + /* 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 bootpg; +} + +phys_addr_t get_spin_phys_addr(void) +{ + return virt_to_phys(&__spin_table); +} + +#ifdef CONFIG_FSL_CORENET +static void plat_mp_up(unsigned long bootpg, unsigned int pagesize) +{ + 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 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_MPC8xxx_PIC_ADDR); + + whoami = in_be32(&pic->whoami); + cpu_up_mask = 1 << whoami; + out_be32(&ccm->bstrl, bootpg); + + e = find_law(bootpg); + /* 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); + + /* disable time base at the platform */ + out_be32(&rcpm->ctbenrl, cpu_up_mask); + + out_be32(&gur->brrl, mask); + + /* wait for everyone */ + while (timeout) { + unsigned int i, cpu, nr_cpus = cpu_numcores(); + + 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); + timeout--; + } + + if (timeout == 0) + printf("CPU up timeout. CPU up mask is %x should be %x\n", + 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, mask); + +#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(&ccm->bstrar, LAW_EN); +#endif +} +#else +static void plat_mp_up(unsigned long bootpg, unsigned int pagesize) +{ + u32 up, cpu_up_mask, whoami; + 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_MPC8xxx_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); + + /* readback to sync write */ + in_be32(&gur->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(NULL); + + lmb_reserve(lmb, bootpg, 4096); +} + +void setup_mp(void) +{ + 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(); + + /* 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 */ + 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_map, pagesize); + } else { + puts("WARNING: No reset page TLB. " + "Skipping secondary core setup\n"); + } +} |