From: Tang Yuantian yuantian.tang@freescale.com
When T104x soc wakes up from deep sleep, control is passed to the primary core that starts executing uboot. After re-initialized some IP blocks, like DDRC, kernel will take responsibility to continue to restore environment it leaves before.
Signed-off-by: Tang Yuantian Yuantian.Tang@freescale.com --- v2: - added explaination for CONFIG_DEEP_SLEEP - fixed some issues
README | 4 +++ arch/powerpc/cpu/mpc85xx/asm-offsets.c | 24 ++++++++++++++ arch/powerpc/cpu/mpc85xx/cpu_init.c | 7 +++++ arch/powerpc/cpu/mpc85xx/fdt.c | 25 +++++++++++++++ arch/powerpc/cpu/mpc85xx/liodn.c | 27 +++++++++++----- arch/powerpc/cpu/mpc85xx/start.S | 12 +++++++ arch/powerpc/include/asm/global_data.h | 2 ++ arch/powerpc/lib/board.c | 57 +++++++++++++++++++++++++++++++--- drivers/ddr/fsl/mpc85xx_ddr_gen3.c | 42 ++++++++++++++++++++++--- include/fsl_ddr_sdram.h | 6 ++++ 10 files changed, 190 insertions(+), 16 deletions(-) create mode 100644 arch/powerpc/cpu/mpc85xx/asm-offsets.c
diff --git a/README b/README index ff49260..0fa646e 100644 --- a/README +++ b/README @@ -427,6 +427,10 @@ The following options need to be configured: In this mode, a single differential clock is used to supply clocks to the sysclock, ddrclock and usbclock.
+ CONFIG_DEEP_SLEEP + Inidcates this SoC supports deep sleep feature. If deep sleep is + supported, core will start to execute uboot when wakes up. + - Generic CPU options: CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN
diff --git a/arch/powerpc/cpu/mpc85xx/asm-offsets.c b/arch/powerpc/cpu/mpc85xx/asm-offsets.c new file mode 100644 index 0000000..1e422e7 --- /dev/null +++ b/arch/powerpc/cpu/mpc85xx/asm-offsets.c @@ -0,0 +1,24 @@ +/* + * Adapted from Linux v2.6.36 kernel: arch/powerpc/kernel/asm-offsets.c + * + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> + +#include <linux/kbuild.h> + +int main(void) +{ + DEFINE(GD_FLAGS_OFF, offsetof(struct global_data, flags)); + + return 0; +} diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index b31efb7..80ffe5c 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -231,6 +231,7 @@ void cpu_init_f (void) #ifdef CONFIG_MPC8548 ccsr_local_ecm_t *ecm = (void *)(CONFIG_SYS_MPC85xx_ECM_ADDR); uint svr = get_svr(); + gd = (gd_t *)(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
/* * CPU2 errata workaround: A core hang possible while executing @@ -282,6 +283,12 @@ void cpu_init_f (void) in_be32(&gur->dcsrcr); #endif
+#ifdef CONFIG_DEEP_SLEEP + /* disable the console if boot from deep sleep */ + if (in_be32(&gur->scrtsr[0]) & (1 << 3)) + gd->flags |= GD_FLG_SILENT | + GD_FLG_DEEP_SLEEP | GD_FLG_DISABLE_CONSOLE; +#endif }
/* Implement a dummy function for those platforms w/o SERDES */ diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c index 33bc900..4404b0b 100644 --- a/arch/powerpc/cpu/mpc85xx/fdt.c +++ b/arch/powerpc/cpu/mpc85xx/fdt.c @@ -24,6 +24,7 @@ DECLARE_GLOBAL_DATA_PTR; extern void ft_qe_setup(void *blob); extern void ft_fixup_num_cores(void *blob); extern void ft_srio_setup(void *blob); +extern ulong __bss_end;
#ifdef CONFIG_MP #include "mp.h" @@ -35,6 +36,9 @@ void ft_fixup_cpu(void *blob, u64 memory_limit) u32 bootpg = determine_mp_bootpg(NULL); u32 id = get_my_id(); const char *enable_method; +#ifdef CONFIG_DEEP_SLEEP + ulong len; +#endif
off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4); while (off != -FDT_ERR_NOTFOUND) { @@ -77,6 +81,25 @@ void ft_fixup_cpu(void *blob, u64 memory_limit) "device_type", "cpu", 4); }
+#ifdef CONFIG_DEEP_SLEEP + /* + * reserve the memory space for deep sleep. + * This space will be re-used next time when boot from deep sleep. + * The space includes bd_t, gd_t, stack and uboot image. + * Reserve 1K for stack. + */ + len = sizeof(bd_t) + sizeof(gd_t) + (1 << 10); + /* round up to 4K */ + len = (len + (4096 - 1)) & ~(4096 - 1); + + off = fdt_add_mem_rsv(blob, gd->relocaddr - len, + len + ((ulong)&__bss_end - gd->relocaddr)); + if (off < 0) + printf("Failed to reserve memory for deep sleep: %s\n", + fdt_strerror(off)); + +#endif + /* Reserve the boot page so OSes dont use it */ if ((u64)bootpg < memory_limit) { off = fdt_add_mem_rsv(blob, bootpg, (u64)4096); @@ -100,6 +123,7 @@ void ft_fixup_cpu(void *blob, u64 memory_limit) } #endif
+#ifndef CONFIG_DEEP_SLEEP /* Reserve spin table page */ if (spin_tbl_addr < memory_limit) { off = fdt_add_mem_rsv(blob, @@ -108,6 +132,7 @@ void ft_fixup_cpu(void *blob, u64 memory_limit) printf("Failed to reserve memory for spin table: %s\n", fdt_strerror(off)); } +#endif } #endif
diff --git a/arch/powerpc/cpu/mpc85xx/liodn.c b/arch/powerpc/cpu/mpc85xx/liodn.c index 19e130e..a166765 100644 --- a/arch/powerpc/cpu/mpc85xx/liodn.c +++ b/arch/powerpc/cpu/mpc85xx/liodn.c @@ -14,6 +14,8 @@ #include <asm/fsl_portals.h> #include <asm/fsl_liodn.h>
+DECLARE_GLOBAL_DATA_PTR; + int get_dpaa_liodn(enum fsl_dpaa_dev dpaa_dev, u32 *liodns, int liodn_offset) { liodns[0] = liodn_bases[dpaa_dev].id[0] + liodn_offset; @@ -164,6 +166,8 @@ static void setup_rman_liodn_base(struct liodn_id_table *tbl, int size)
void set_liodns(void) { + bool is_deepsleep = false; + /* setup general liodn offsets */ set_liodn(liodn_tbl, liodn_tbl_sz);
@@ -179,16 +183,25 @@ void set_liodns(void) }
/* setup FMAN block(s) liodn bases & offsets if we have one */ +#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) + is_deepsleep = true; +#endif + #ifdef CONFIG_SYS_DPAA_FMAN - set_liodn(fman1_liodn_tbl, fman1_liodn_tbl_sz); - setup_fman_liodn_base(FSL_HW_PORTAL_FMAN1, fman1_liodn_tbl, - fman1_liodn_tbl_sz); + if (!is_deepsleep) { + set_liodn(fman1_liodn_tbl, fman1_liodn_tbl_sz); + setup_fman_liodn_base(FSL_HW_PORTAL_FMAN1, fman1_liodn_tbl, + fman1_liodn_tbl_sz); + } +#endif
#if (CONFIG_SYS_NUM_FMAN == 2) - set_liodn(fman2_liodn_tbl, fman2_liodn_tbl_sz); - setup_fman_liodn_base(FSL_HW_PORTAL_FMAN2, fman2_liodn_tbl, - fman2_liodn_tbl_sz); -#endif + if (!is_deepsleep) { + set_liodn(fman2_liodn_tbl, fman2_liodn_tbl_sz); + setup_fman_liodn_base(FSL_HW_PORTAL_FMAN2, fman2_liodn_tbl, + fman2_liodn_tbl_sz); + } #endif /* setup PME liodn base */ setup_pme_liodn_base(); diff --git a/arch/powerpc/cpu/mpc85xx/start.S b/arch/powerpc/cpu/mpc85xx/start.S index dbbd8e5..fa5622b 100644 --- a/arch/powerpc/cpu/mpc85xx/start.S +++ b/arch/powerpc/cpu/mpc85xx/start.S @@ -23,6 +23,8 @@ #include <asm/cache.h> #include <asm/mmu.h>
+#include <generated/asm-offsets.h> + #undef MSR_KERNEL #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
@@ -1669,6 +1671,16 @@ relocate_code: * Now relocate code */
+#ifdef CONFIG_DEEP_SLEEP + /* don't copy uboot again in deep sleep case */ + mr r0, r3 + lwz r3, GD_FLAGS_OFF(r9) + andis. r3, r3, 1 + cmpwi r3, 0 + bne 7f + mr r3, r0 +#endif + cmplw cr1,r3,r4 addi r0,r5,3 srwi. r0,r0,2 diff --git a/arch/powerpc/include/asm/global_data.h b/arch/powerpc/include/asm/global_data.h index 8e59e8b..219e112 100644 --- a/arch/powerpc/include/asm/global_data.h +++ b/arch/powerpc/include/asm/global_data.h @@ -117,6 +117,8 @@ struct arch_global_data { #include <asm-generic/global_data.h>
#if 1 +/* Indicates the deep sleep case */ +#define GD_FLG_DEEP_SLEEP 0x10000 #define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r2") #else /* We could use plain global data, but the resulting code is bigger */ #define XTRN_DECLARE_GLOBAL_DATA_PTR extern diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c index 13d761c..3af4418 100644 --- a/arch/powerpc/lib/board.c +++ b/arch/powerpc/lib/board.c @@ -459,10 +459,18 @@ void board_init_f(ulong bootflag)
/* * reserve memory for malloc() arena + * don't reserve it in deep sleep case */ - addr_sp = addr - TOTAL_MALLOC_LEN; - debug("Reserving %dk for malloc() at: %08lx\n", - TOTAL_MALLOC_LEN >> 10, addr_sp); +#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) + addr_sp = addr; + else +#endif + { + addr_sp = addr - TOTAL_MALLOC_LEN; + debug("Reserving %dk for malloc() at: %08lx\n", + TOTAL_MALLOC_LEN >> 10, addr_sp); + }
/* * (permanently) allocate a Board Info struct @@ -573,6 +581,14 @@ void board_init_r(gd_t *id, ulong dest_addr) { bd_t *bd; ulong malloc_start; +#ifdef CONFIG_DEEP_SLEEP + u32 start; + int i; + struct ccsr_scfg *scfg = (void *)CONFIG_SYS_MPC85xx_SCFG; + u64 *src, *dst; + typedef void (*func_t)(void); + func_t kernel_resume; +#endif
#ifndef CONFIG_SYS_NO_FLASH ulong flash_size; @@ -583,6 +599,22 @@ void board_init_r(gd_t *id, ulong dest_addr)
gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
+#ifdef CONFIG_DEEP_SLEEP + /* + * restore 128-byte memory space which corrupted + * by DDRC training. + */ + if (gd->flags & GD_FLG_DEEP_SLEEP) { + src = (u64 *)in_be32(&scfg->sparecr[2]); + dst = (u64 *)(0); + for (i = 0; i < 128/sizeof(u64); i++) { + *dst = *src; + dst++; + src++; + } + } +#endif + /* The Malloc area is immediately below the monitor copy in DRAM */ malloc_start = dest_addr - TOTAL_MALLOC_LEN;
@@ -621,7 +653,10 @@ void board_init_r(gd_t *id, ulong dest_addr) /* * Setup trap handlers */ - trap_init(dest_addr); +#ifdef CONFIG_DEEP_SLEEP + if ((gd->flags & GD_FLG_DEEP_SLEEP) == 0) +#endif + trap_init(dest_addr);
#ifdef CONFIG_ADDR_MAP init_addr_map(); @@ -668,7 +703,10 @@ void board_init_r(gd_t *id, ulong dest_addr)
asm("sync ; isync");
- mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN); +#ifdef CONFIG_DEEP_SLEEP + if ((gd->flags & GD_FLG_DEEP_SLEEP) == 0) +#endif + mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN);
#if !defined(CONFIG_SYS_NO_FLASH) puts("Flash: "); @@ -725,6 +763,15 @@ void board_init_r(gd_t *id, ulong dest_addr) /* initialize higher level parts of CPU like time base and timers */ cpu_init_r();
+#ifdef CONFIG_DEEP_SLEEP + /* Jump to kernel in deep sleep case */ + if (gd->flags & GD_FLG_DEEP_SLEEP) { + start = in_be32(&scfg->sparecr[1]); + kernel_resume = (func_t)start; + kernel_resume(); + } +#endif + WATCHDOG_RESET();
#ifdef CONFIG_SPI diff --git a/drivers/ddr/fsl/mpc85xx_ddr_gen3.c b/drivers/ddr/fsl/mpc85xx_ddr_gen3.c index c805086..57ade09 100644 --- a/drivers/ddr/fsl/mpc85xx_ddr_gen3.c +++ b/drivers/ddr/fsl/mpc85xx_ddr_gen3.c @@ -15,6 +15,7 @@ #error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL #endif
+DECLARE_GLOBAL_DATA_PTR;
/* * regs has the to-be-set values for DDR controller registers @@ -119,7 +120,13 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0); out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1); out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2); - out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); +#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) + out_be32(&ddr->sdram_cfg_2, + regs->ddr_sdram_cfg_2 & ~SDRAM_CFG2_D_INIT); + else +#endif + out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode); out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2); out_be32(&ddr->sdram_mode_3, regs->ddr_sdram_mode_3); @@ -132,8 +139,16 @@ void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval); out_be32(&ddr->sdram_data_init, regs->ddr_data_init); out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl); - out_be32(&ddr->init_addr, regs->ddr_init_addr); - out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr); +#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) { + out_be32(&ddr->init_addr, 0); + out_be32(&ddr->init_ext_addr, (1 << 31)); + } else +#endif + { + out_be32(&ddr->init_addr, regs->ddr_init_addr); + out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr); + }
out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4); out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5); @@ -374,8 +389,22 @@ step2: udelay(500); asm volatile("sync;isync");
+#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) { + /* enter self-refresh */ + setbits_be32(&ddr->sdram_cfg_2, (1 << 31)); + /* do board specific memory setup */ + board_mem_sleep_setup(); + } +#endif + /* Let the controller go */ - temp_sdram_cfg = in_be32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI; +#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) + temp_sdram_cfg = (in_be32(&ddr->sdram_cfg) | SDRAM_CFG_BI); + else +#endif + temp_sdram_cfg = (in_be32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI); out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN); asm volatile("sync;isync");
@@ -526,4 +555,9 @@ step2: clrbits_be32(&ddr->sdram_cfg, 0x2); } #endif /* CONFIG_SYS_FSL_ERRATUM_DDR111_DDR134 */ +#ifdef CONFIG_DEEP_SLEEP + if (gd->flags & GD_FLG_DEEP_SLEEP) + /* exit self-refresh */ + clrbits_be32(&ddr->sdram_cfg_2, (1 << 31)); +#endif } diff --git a/include/fsl_ddr_sdram.h b/include/fsl_ddr_sdram.h index 2a36431..22c7b01 100644 --- a/include/fsl_ddr_sdram.h +++ b/include/fsl_ddr_sdram.h @@ -357,6 +357,12 @@ static int __board_need_mem_reset(void) int board_need_mem_reset(void) __attribute__((weak, alias("__board_need_mem_reset")));
+static void __board_mem_sleep_setup(void) +{ +} +void board_mem_sleep_setup(void) + __attribute__((weak, alias("__board_mem_sleep_setup"))); + /* * The 85xx boards have a common prototype for fixed_sdram so put the * declaration here.