From 340848b1853fde95991cb76fee78a69eafd83335 Mon Sep 17 00:00:00 2001 From: Wang Dongsheng Date: Thu, 4 Jun 2015 12:01:09 +0800 Subject: [PATCH] arm/ls102xa: Add PSCI support for ls102xa Base on PSCI services, implement CPU_ON/CPU_OFF for ls102xa platform. Tested on LS1021AQDS, LS1021ATWR. Test CPU hotplug times: 60K Test kernel boot times: 1.2K Signed-off-by: Wang Dongsheng Acked-by: Alison Wang Reviewed-by: York Sun --- arch/arm/cpu/armv7/ls102xa/Makefile | 4 + arch/arm/cpu/armv7/ls102xa/psci.S | 126 ++++++++++++++++++++++++++++ include/configs/ls1021aqds.h | 2 + include/configs/ls1021atwr.h | 2 + 4 files changed, 134 insertions(+) create mode 100644 arch/arm/cpu/armv7/ls102xa/psci.S diff --git a/arch/arm/cpu/armv7/ls102xa/Makefile b/arch/arm/cpu/armv7/ls102xa/Makefile index 2e6a20757f..2d55782749 100644 --- a/arch/arm/cpu/armv7/ls102xa/Makefile +++ b/arch/arm/cpu/armv7/ls102xa/Makefile @@ -12,3 +12,7 @@ obj-y += fsl_epu.o obj-$(CONFIG_OF_LIBFDT) += fdt.o obj-$(CONFIG_SYS_HAS_SERDES) += fsl_ls1_serdes.o ls102xa_serdes.o obj-$(CONFIG_SPL) += spl.o + +ifdef CONFIG_ARMV7_PSCI +obj-y += psci.o +endif diff --git a/arch/arm/cpu/armv7/ls102xa/psci.S b/arch/arm/cpu/armv7/ls102xa/psci.S new file mode 100644 index 0000000000..cf5cd48bcb --- /dev/null +++ b/arch/arm/cpu/armv7/ls102xa/psci.S @@ -0,0 +1,126 @@ +/* + * Copyright 2015 Freescale Semiconductor, Inc. + * Author: Wang Dongsheng + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include + +#include +#include +#include + +#define SCFG_CORE0_SFT_RST 0x130 +#define SCFG_CORESRENCR 0x204 + +#define DCFG_CCSR_BRR 0x0E4 +#define DCFG_CCSR_SCRATCHRW1 0x200 + + .pushsection ._secure.text, "ax" + + .arch_extension sec + +#define ONE_MS (GENERIC_TIMER_CLK / 1000) +#define RESET_WAIT (30 * ONE_MS) + + @ r1 = target CPU + @ r2 = target PC +.globl psci_cpu_on +psci_cpu_on: + push {lr} + + @ Clear and Get the correct CPU number + @ r1 = 0xf01 + and r1, r1, #0xff + + mov r0, r1 + bl psci_get_cpu_stack_top + str r2, [r0] + dsb + + @ Get DCFG base address + movw r4, #(CONFIG_SYS_FSL_GUTS_ADDR & 0xffff) + movt r4, #(CONFIG_SYS_FSL_GUTS_ADDR >> 16) + + @ Detect target CPU state + ldr r2, [r4, #DCFG_CCSR_BRR] + rev r2, r2 + lsr r2, r2, r1 + ands r2, r2, #1 + beq holdoff_release + + @ Reset target CPU + @ Get SCFG base address + movw r0, #(CONFIG_SYS_FSL_SCFG_ADDR & 0xffff) + movt r0, #(CONFIG_SYS_FSL_SCFG_ADDR >> 16) + + @ Enable CORE Soft Reset + movw r5, #0 + movt r5, #(1 << 15) + rev r5, r5 + str r5, [r0, #SCFG_CORESRENCR] + + @ Get CPUx offset register + mov r6, #0x4 + mul r6, r6, r1 + add r2, r0, r6 + + @ Do reset on target CPU + movw r5, #0 + movt r5, #(1 << 15) + rev r5, r5 + str r5, [r2, #SCFG_CORE0_SFT_RST] + + @ Wait target CPU up + timer_wait r2, RESET_WAIT + + @ Disable CORE soft reset + mov r5, #0 + str r5, [r0, #SCFG_CORESRENCR] + +holdoff_release: + @ Release on target CPU + ldr r2, [r4, #DCFG_CCSR_BRR] + mov r6, #1 + lsl r6, r6, r1 @ 32 bytes per CPU + + rev r6, r6 + orr r2, r2, r6 + str r2, [r4, #DCFG_CCSR_BRR] + + @ Set secondary boot entry + ldr r6, =psci_cpu_entry + rev r6, r6 + str r6, [r4, #DCFG_CCSR_SCRATCHRW1] + + isb + dsb + + @ Return + mov r0, #ARM_PSCI_RET_SUCCESS + + pop {lr} + bx lr + +.globl psci_cpu_off +psci_cpu_off: + bl psci_cpu_off_common + +1: wfi + b 1b + +.globl psci_arch_init +psci_arch_init: + mov r6, lr + + bl psci_get_cpu_id + bl psci_get_cpu_stack_top + mov sp, r0 + + bx r6 + + .globl psci_text_end +psci_text_end: + .popsection diff --git a/include/configs/ls1021aqds.h b/include/configs/ls1021aqds.h index 8a5a707d3b..cacbae7490 100644 --- a/include/configs/ls1021aqds.h +++ b/include/configs/ls1021aqds.h @@ -9,6 +9,8 @@ #define CONFIG_LS102XA +#define CONFIG_ARMV7_PSCI + #define CONFIG_SYS_GENERIC_BOARD #define CONFIG_DISPLAY_CPUINFO diff --git a/include/configs/ls1021atwr.h b/include/configs/ls1021atwr.h index 233b3d092c..d0432c35ac 100644 --- a/include/configs/ls1021atwr.h +++ b/include/configs/ls1021atwr.h @@ -9,6 +9,8 @@ #define CONFIG_LS102XA +#define CONFIG_ARMV7_PSCI + #define CONFIG_SYS_GENERIC_BOARD #define CONFIG_DISPLAY_CPUINFO -- 2.30.2