mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 11:00:15 +00:00
1a4596601f
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
472 lines
11 KiB
C
472 lines
11 KiB
C
/*
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* Copyright 2008-2011 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <ioports.h>
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#include <lmb.h>
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#include <asm/io.h>
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#include <asm/mmu.h>
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#include <asm/fsl_law.h>
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#include <asm/fsl_ddr_sdram.h>
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#include "mp.h"
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DECLARE_GLOBAL_DATA_PTR;
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u32 fsl_ddr_get_intl3r(void);
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extern u32 __spin_table[];
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u32 get_my_id()
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{
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return mfspr(SPRN_PIR);
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}
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/*
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* Determine if U-Boot should keep secondary cores in reset, or let them out
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* of reset and hold them in a spinloop
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*/
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int hold_cores_in_reset(int verbose)
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{
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/* Default to no, overriden by 'y', 'yes', 'Y', 'Yes', or '1' */
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if (getenv_yesno("mp_holdoff") == 1) {
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if (verbose) {
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puts("Secondary cores are being held in reset.\n");
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puts("See 'mp_holdoff' environment variable\n");
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}
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return 1;
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}
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return 0;
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}
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int cpu_reset(int nr)
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{
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volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
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out_be32(&pic->pir, 1 << nr);
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/* the dummy read works around an errata on early 85xx MP PICs */
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(void)in_be32(&pic->pir);
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out_be32(&pic->pir, 0x0);
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return 0;
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}
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int cpu_status(int nr)
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{
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u32 *table, id = get_my_id();
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if (hold_cores_in_reset(1))
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return 0;
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if (nr == id) {
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table = (u32 *)&__spin_table;
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printf("table base @ 0x%p\n", table);
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} else if (is_core_disabled(nr)) {
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puts("Disabled\n");
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} else {
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table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY;
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printf("Running on cpu %d\n", id);
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printf("\n");
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printf("table @ 0x%p\n", table);
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printf(" addr - 0x%08x\n", table[BOOT_ENTRY_ADDR_LOWER]);
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printf(" r3 - 0x%08x\n", table[BOOT_ENTRY_R3_LOWER]);
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printf(" pir - 0x%08x\n", table[BOOT_ENTRY_PIR]);
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}
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return 0;
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}
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#ifdef CONFIG_FSL_CORENET
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int cpu_disable(int nr)
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{
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volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
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setbits_be32(&gur->coredisrl, 1 << nr);
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return 0;
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}
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int is_core_disabled(int nr) {
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ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
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u32 coredisrl = in_be32(&gur->coredisrl);
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return (coredisrl & (1 << nr));
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}
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#else
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int cpu_disable(int nr)
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{
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volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
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switch (nr) {
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case 0:
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setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU0);
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break;
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case 1:
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setbits_be32(&gur->devdisr, MPC85xx_DEVDISR_CPU1);
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break;
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default:
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printf("Invalid cpu number for disable %d\n", nr);
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return 1;
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}
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return 0;
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}
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int is_core_disabled(int nr) {
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ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
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u32 devdisr = in_be32(&gur->devdisr);
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switch (nr) {
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case 0:
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return (devdisr & MPC85xx_DEVDISR_CPU0);
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case 1:
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return (devdisr & MPC85xx_DEVDISR_CPU1);
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default:
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printf("Invalid cpu number for disable %d\n", nr);
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}
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return 0;
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}
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#endif
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static u8 boot_entry_map[4] = {
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0,
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BOOT_ENTRY_PIR,
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BOOT_ENTRY_R3_LOWER,
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};
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int cpu_release(int nr, int argc, char * const argv[])
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{
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u32 i, val, *table = (u32 *)&__spin_table + nr * NUM_BOOT_ENTRY;
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u64 boot_addr;
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if (hold_cores_in_reset(1))
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return 0;
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if (nr == get_my_id()) {
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printf("Invalid to release the boot core.\n\n");
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return 1;
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}
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if (argc != 4) {
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printf("Invalid number of arguments to release.\n\n");
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return 1;
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}
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boot_addr = simple_strtoull(argv[0], NULL, 16);
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/* handle pir, r3 */
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for (i = 1; i < 3; i++) {
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if (argv[i][0] != '-') {
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u8 entry = boot_entry_map[i];
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val = simple_strtoul(argv[i], NULL, 16);
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table[entry] = val;
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}
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}
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table[BOOT_ENTRY_ADDR_UPPER] = (u32)(boot_addr >> 32);
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/* ensure all table updates complete before final address write */
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eieio();
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table[BOOT_ENTRY_ADDR_LOWER] = (u32)(boot_addr & 0xffffffff);
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return 0;
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}
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u32 determine_mp_bootpg(unsigned int *pagesize)
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{
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u32 bootpg;
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#ifdef CONFIG_SYS_FSL_ERRATUM_A004468
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u32 svr = get_svr();
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u32 granule_size, check;
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struct law_entry e;
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#endif
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/* use last 4K of mapped memory */
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bootpg = ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
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CONFIG_MAX_MEM_MAPPED : gd->ram_size) +
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CONFIG_SYS_SDRAM_BASE - 4096;
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if (pagesize)
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*pagesize = 4096;
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#ifdef CONFIG_SYS_FSL_ERRATUM_A004468
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/*
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* Erratum A004468 has two parts. The 3-way interleaving applies to T4240,
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* to be fixed in rev 2.0. The 2-way interleaving applies to many SoCs. But
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* the way boot page chosen in u-boot avoids hitting this erratum. So only
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* thw workaround for 3-way interleaving is needed.
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*
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* To make sure boot page translation works with 3-Way DDR interleaving
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* enforce a check for the following constrains
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* 8K granule size requires BRSIZE=8K and
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* bootpg >> log2(BRSIZE) %3 == 1
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* 4K and 1K granule size requires BRSIZE=4K and
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* bootpg >> log2(BRSIZE) %3 == 0
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*/
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if (SVR_SOC_VER(svr) == SVR_T4240 && SVR_MAJ(svr) < 2) {
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e = find_law(bootpg);
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switch (e.trgt_id) {
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case LAW_TRGT_IF_DDR_INTLV_123:
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granule_size = fsl_ddr_get_intl3r() & 0x1f;
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if (granule_size == FSL_DDR_3WAY_8KB_INTERLEAVING) {
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if (pagesize)
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*pagesize = 8192;
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bootpg &= 0xffffe000; /* align to 8KB */
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check = bootpg >> 13;
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while ((check % 3) != 1)
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check--;
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bootpg = check << 13;
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debug("Boot page (8K) at 0x%08x\n", bootpg);
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break;
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} else {
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bootpg &= 0xfffff000; /* align to 4KB */
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check = bootpg >> 12;
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while ((check % 3) != 0)
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check--;
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bootpg = check << 12;
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debug("Boot page (4K) at 0x%08x\n", bootpg);
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}
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break;
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default:
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break;
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}
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}
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#endif /* CONFIG_SYS_FSL_ERRATUM_A004468 */
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return bootpg;
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}
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phys_addr_t get_spin_phys_addr(void)
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{
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return virt_to_phys(&__spin_table);
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}
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#ifdef CONFIG_FSL_CORENET
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static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
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{
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u32 cpu_up_mask, whoami, brsize = LAW_SIZE_4K;
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u32 *table = (u32 *)&__spin_table;
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volatile ccsr_gur_t *gur;
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volatile ccsr_local_t *ccm;
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volatile ccsr_rcpm_t *rcpm;
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volatile ccsr_pic_t *pic;
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int timeout = 10;
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u32 mask = cpu_mask();
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struct law_entry e;
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gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
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ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
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rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
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pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
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whoami = in_be32(&pic->whoami);
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cpu_up_mask = 1 << whoami;
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out_be32(&ccm->bstrl, bootpg);
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e = find_law(bootpg);
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/* pagesize is only 4K or 8K */
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if (pagesize == 8192)
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brsize = LAW_SIZE_8K;
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out_be32(&ccm->bstrar, LAW_EN | e.trgt_id << 20 | brsize);
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debug("BRSIZE is 0x%x\n", brsize);
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/* readback to sync write */
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in_be32(&ccm->bstrar);
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/* disable time base at the platform */
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out_be32(&rcpm->ctbenrl, cpu_up_mask);
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out_be32(&gur->brrl, mask);
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/* wait for everyone */
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while (timeout) {
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unsigned int i, cpu, nr_cpus = cpu_numcores();
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for_each_cpu(i, cpu, nr_cpus, mask) {
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if (table[cpu * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
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cpu_up_mask |= (1 << cpu);
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}
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if ((cpu_up_mask & mask) == mask)
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break;
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udelay(100);
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timeout--;
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}
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if (timeout == 0)
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printf("CPU up timeout. CPU up mask is %x should be %x\n",
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cpu_up_mask, mask);
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/* enable time base at the platform */
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out_be32(&rcpm->ctbenrl, 0);
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/* readback to sync write */
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in_be32(&rcpm->ctbenrl);
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mtspr(SPRN_TBWU, 0);
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mtspr(SPRN_TBWL, 0);
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out_be32(&rcpm->ctbenrl, mask);
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#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
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/*
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* Disabling Boot Page Translation allows the memory region 0xfffff000
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* to 0xffffffff to be used normally. Leaving Boot Page Translation
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* enabled remaps 0xfffff000 to SDRAM which makes that memory region
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* unusable for normal operation but it does allow OSes to easily
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* reset a processor core to put it back into U-Boot's spinloop.
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*/
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clrbits_be32(&ccm->bstrar, LAW_EN);
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#endif
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}
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#else
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static void plat_mp_up(unsigned long bootpg, unsigned int pagesize)
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{
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u32 up, cpu_up_mask, whoami;
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u32 *table = (u32 *)&__spin_table;
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volatile u32 bpcr;
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volatile ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR);
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volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
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volatile ccsr_pic_t *pic = (void *)(CONFIG_SYS_MPC8xxx_PIC_ADDR);
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u32 devdisr;
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int timeout = 10;
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whoami = in_be32(&pic->whoami);
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out_be32(&ecm->bptr, 0x80000000 | (bootpg >> 12));
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/* disable time base at the platform */
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devdisr = in_be32(&gur->devdisr);
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if (whoami)
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devdisr |= MPC85xx_DEVDISR_TB0;
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else
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devdisr |= MPC85xx_DEVDISR_TB1;
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out_be32(&gur->devdisr, devdisr);
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/* release the hounds */
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up = ((1 << cpu_numcores()) - 1);
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bpcr = in_be32(&ecm->eebpcr);
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bpcr |= (up << 24);
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out_be32(&ecm->eebpcr, bpcr);
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asm("sync; isync; msync");
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cpu_up_mask = 1 << whoami;
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/* wait for everyone */
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while (timeout) {
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int i;
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for (i = 0; i < cpu_numcores(); i++) {
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if (table[i * NUM_BOOT_ENTRY + BOOT_ENTRY_ADDR_LOWER])
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cpu_up_mask |= (1 << i);
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};
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if ((cpu_up_mask & up) == up)
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break;
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udelay(100);
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timeout--;
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}
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if (timeout == 0)
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printf("CPU up timeout. CPU up mask is %x should be %x\n",
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cpu_up_mask, up);
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/* enable time base at the platform */
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if (whoami)
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devdisr |= MPC85xx_DEVDISR_TB1;
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else
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devdisr |= MPC85xx_DEVDISR_TB0;
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out_be32(&gur->devdisr, devdisr);
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/* readback to sync write */
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in_be32(&gur->devdisr);
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mtspr(SPRN_TBWU, 0);
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mtspr(SPRN_TBWL, 0);
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devdisr &= ~(MPC85xx_DEVDISR_TB0 | MPC85xx_DEVDISR_TB1);
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out_be32(&gur->devdisr, devdisr);
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#ifdef CONFIG_MPC8xxx_DISABLE_BPTR
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/*
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* Disabling Boot Page Translation allows the memory region 0xfffff000
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* to 0xffffffff to be used normally. Leaving Boot Page Translation
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* enabled remaps 0xfffff000 to SDRAM which makes that memory region
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* unusable for normal operation but it does allow OSes to easily
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* reset a processor core to put it back into U-Boot's spinloop.
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*/
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clrbits_be32(&ecm->bptr, 0x80000000);
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#endif
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}
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#endif
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void cpu_mp_lmb_reserve(struct lmb *lmb)
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{
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u32 bootpg = determine_mp_bootpg(NULL);
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lmb_reserve(lmb, bootpg, 4096);
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}
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void setup_mp(void)
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{
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extern u32 __secondary_start_page;
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extern u32 __bootpg_addr, __spin_table_addr, __second_half_boot_page;
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int i;
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ulong fixup = (u32)&__secondary_start_page;
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u32 bootpg, bootpg_map, pagesize;
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bootpg = determine_mp_bootpg(&pagesize);
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/*
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* pagesize is only 4K or 8K
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* we only use the last 4K of boot page
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* bootpg_map saves the address for the boot page
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* 8K is used for the workaround of 3-way DDR interleaving
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*/
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bootpg_map = bootpg;
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if (pagesize == 8192)
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bootpg += 4096; /* use 2nd half */
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/* Some OSes expect secondary cores to be held in reset */
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if (hold_cores_in_reset(0))
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return;
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/*
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* Store the bootpg's cache-able half address for use by secondary
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* CPU cores to continue to boot
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*/
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__bootpg_addr = (u32)virt_to_phys(&__second_half_boot_page);
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/* Store spin table's physical address for use by secondary cores */
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__spin_table_addr = (u32)get_spin_phys_addr();
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/* flush bootpg it before copying invalidate any staled cacheline */
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flush_cache(bootpg, 4096);
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/* look for the tlb covering the reset page, there better be one */
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i = find_tlb_idx((void *)CONFIG_BPTR_VIRT_ADDR, 1);
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/* we found a match */
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if (i != -1) {
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/* map reset page to bootpg so we can copy code there */
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disable_tlb(i);
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set_tlb(1, CONFIG_BPTR_VIRT_ADDR, bootpg, /* tlb, epn, rpn */
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MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, /* perms, wimge */
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0, i, BOOKE_PAGESZ_4K, 1); /* ts, esel, tsize, iprot */
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memcpy((void *)CONFIG_BPTR_VIRT_ADDR, (void *)fixup, 4096);
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plat_mp_up(bootpg_map, pagesize);
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} else {
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puts("WARNING: No reset page TLB. "
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"Skipping secondary core setup\n");
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}
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}
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