/*
- * 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 <common.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);
{
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;
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;
+ 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;
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);
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;
- return (determine_mp_bootpg() +
- (ulong)&__spin_table - (ulong)&__secondary_start_page);
+#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;
}
-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);
rcpm = (void *)(CONFIG_SYS_FSL_CORENET_RCPM_ADDR);
pic = (void *)(CONFIG_SYS_MPC8xxx_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);
+ /* 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);
- /* 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);
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
/*
* 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);
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);
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) {
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");
projects / karo-tx-uboot.git / blobdiff