--- /dev/null
+/*
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#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 <fsl_ddr_sdram.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, 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_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(int 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(int 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(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;
+}
+
+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(int 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");
+ }
+}
Code Review / kvmfornfv.git / blobdiff