So far, only supporting the CPU_ON method. Other functions can be added later.
Signed-off-by: Marc Zyngier marc.zyngier@arm.com --- arch/arm/cpu/armv7/sunxi/Makefile | 3 + arch/arm/cpu/armv7/sunxi/psci.S | 124 +++++++++++++++++++++++++++++++ arch/arm/cpu/armv7/sunxi/u-boot-psci.lds | 63 ++++++++++++++++ include/configs/sun7i.h | 6 ++ 4 files changed, 196 insertions(+) create mode 100644 arch/arm/cpu/armv7/sunxi/psci.S create mode 100644 arch/arm/cpu/armv7/sunxi/u-boot-psci.lds
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile index f71a26d..0369049 100644 --- a/arch/arm/cpu/armv7/sunxi/Makefile +++ b/arch/arm/cpu/armv7/sunxi/Makefile @@ -43,6 +43,9 @@ obj-y += cpu_info.o ifdef CONFIG_CMD_WATCHDOG obj-$(CONFIG_CMD_WATCHDOG) += cmd_watchdog.o endif +ifdef CONFIG_ARMV7_PSCI +obj-y += psci.o +endif endif
ifdef CONFIG_SPL_BUILD diff --git a/arch/arm/cpu/armv7/sunxi/psci.S b/arch/arm/cpu/armv7/sunxi/psci.S new file mode 100644 index 0000000..eb11883 --- /dev/null +++ b/arch/arm/cpu/armv7/sunxi/psci.S @@ -0,0 +1,124 @@ +/* + * Copyright (C) 2013 - ARM Ltd + * Author: Marc Zyngier marc.zyngier@arm.com + * + * Based on code by Carl van Schaik carl@ok-labs.com. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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, see http://www.gnu.org/licenses/. + */ + +#include <config.h> +#include <asm/psci.h> +#include <asm/arch/cpu.h> + + .pushsection ._secure.text, "ax" + + .arch_extension sec + +#define TEN_MS (10 * CONFIG_SYS_CLK_FREQ / 1000) + + @ r1 = target CPU + @ r2 = target PC +.globl psci_cpu_on +psci_cpu_on: + adr r0, _target_pc + str r2, [r0] + dsb + + movw r0, #(SUNXI_CPUCFG_BASE & 0xffff) + movt r0, #(SUNXI_CPUCFG_BASE >> 16) + + @ CPU mask + and r1, r1, #3 @ only care about first cluster + mov r4, #1 + lsl r4, r4, r1 + + adr r6, _sunxi_cpu_entry + str r6, [r0, #0x1a4] @ PRIVATE_REG (boot vector) + + @ Assert reset on target CPU + mov r6, #0 + lsl r5, r1, #6 @ 64 bytes per CPU + add r5, r5, #0x40 @ Offset from base + add r5, r5, r0 @ CPU control block + str r6, [r5] @ Reset CPU + + @ l1 invalidate + ldr r6, [r0, #0x184] + bic r6, r6, r4 + str r6, [r0, #0x184] + + @ Lock CPU + ldr r6, [r0, #0x1e4] + bic r6, r6, r4 + str r6, [r0, #0x1e4] + + @ Release power clamp + movw r6, #0x1ff + movt r6, #0 +1: lsrs r6, r6, #1 + str r6, [r0, #0x1b0] + bne 1b + + @ Write CNTP_TVAL : 10ms @ 24MHz (240000 cycles) + movw r1, #(TEN_MS & 0xffff) + movt r1, #(TEN_MS >> 16) + mcr p15, 0, r1, c14, c2, 0 + isb + @ Enable physical timer, mask interrupt + mov r1, #3 + mcr p15, 0, r1, c14, c2, 1 + @ Poll physical timer until ISTATUS is on +1: isb + mrc p15, 0, r1, c14, c2, 1 + ands r1, r1, #4 + bne 1b + @ Disable timer + mov r1, #0 + mcr p15, 0, r1, c14, c2, 1 + isb + + @ Clear power gating + ldr r6, [r0, #0x1b4] + bic r6, r6, #1 + str r6, [r0, #0x1b4] + + @ Deassert reset on target CPU + mov r6, #3 + str r6, [r5] + + @ Unlock CPU + ldr r6, [r0, #0x1e4] + orr r6, r6, r4 + str r6, [r0, #0x1e4] + + mov r0, #ARM_PSCI_RET_SUCCESS @ Return PSCI_RET_SUCCESS + mov pc, lr + +_target_pc: + .word 0 + +_sunxi_cpu_entry: + @ Set SMP bit + mrc p15, 0, r0, c1, c0, 1 + orr r0, r0, #0x40 + mcr p15, 0, r0, c1, c0, 1 + isb + + bl _nonsec_init + + adr r0, _target_pc + ldr r0, [r0] + b _do_nonsec_entry + + .popsection diff --git a/arch/arm/cpu/armv7/sunxi/u-boot-psci.lds b/arch/arm/cpu/armv7/sunxi/u-boot-psci.lds new file mode 100644 index 0000000..a0f166e --- /dev/null +++ b/arch/arm/cpu/armv7/sunxi/u-boot-psci.lds @@ -0,0 +1,63 @@ +/* + * (C) Copyright 2013 ARM Ltd + * Marc Zyngier marc.zyngier@arm.com + * + * Based on sunxi/u-boot-spl.lds: + * + * (C) Copyright 2012 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie tangliang@allwinnertech.com + * + * Based on omap-common/u-boot-spl.lds: + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, garyj@denx.de + * + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * Aneesh V aneesh@ti.com + * + * 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 + */ + +MEMORY { sram : ORIGIN = CONFIG_ARMV7_PSCI_BASE, LENGTH = 0x1000 } +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +SECTIONS +{ + .text : + { + _start = .; + *(.text*) + } > sram + + . = ALIGN(4); + .rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } > sram + + . = ALIGN(4); + .data : { *(SORT_BY_ALIGNMENT(.data*)) } > sram + + . = ALIGN(4); + _end = .; + + /DISCARD/ : { + *(.bss*) + } +} diff --git a/include/configs/sun7i.h b/include/configs/sun7i.h index a6ede2a..c3c24fb 100644 --- a/include/configs/sun7i.h +++ b/include/configs/sun7i.h @@ -38,6 +38,12 @@ #define CONFIG_BOARD_POSTCLK_INIT 1 #endif
+#define CONFIG_ARMV7_VIRT 1 +#define CONFIG_ARMV7_NONSEC 1 +#define CONFIG_ARMV7_PSCI 1 +#define CONFIG_ARMV7_PSCI_NR_CPUS 2 +#define CONFIG_ARMV7_SECURE_BASE SUNXI_SRAM_B_BASE + /* * Include common sunxi configuration where most the settings are */