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-rw-r--r--arch/arm/cpu/armv7/sunxi/Makefile7
-rw-r--r--arch/arm/cpu/armv7/sunxi/psci.c273
-rw-r--r--arch/arm/cpu/armv7/sunxi/psci_head.S66
-rw-r--r--arch/arm/cpu/armv7/sunxi/psci_sun6i.S262
-rw-r--r--arch/arm/cpu/armv7/sunxi/psci_sun7i.S237
5 files changed, 341 insertions, 504 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index 4d2274a38e..c208510168 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -13,11 +13,8 @@ obj-$(CONFIG_MACH_SUN6I) += tzpc.o
obj-$(CONFIG_MACH_SUN8I_H3) += tzpc.o
ifndef CONFIG_SPL_BUILD
-ifdef CONFIG_ARMV7_PSCI
-obj-$(CONFIG_MACH_SUN6I) += psci_sun6i.o
-obj-$(CONFIG_MACH_SUN7I) += psci_sun7i.o
-obj-$(CONFIG_MACH_SUN8I) += psci_sun6i.o
-endif
+obj-$(CONFIG_ARMV7_PSCI) += psci.o
+obj-$(CONFIG_ARMV7_PSCI) += psci_head.o
endif
ifdef CONFIG_SPL_BUILD
diff --git a/arch/arm/cpu/armv7/sunxi/psci.c b/arch/arm/cpu/armv7/sunxi/psci.c
new file mode 100644
index 0000000000..a118e9d0c4
--- /dev/null
+++ b/arch/arm/cpu/armv7/sunxi/psci.c
@@ -0,0 +1,273 @@
+/*
+ * Copyright (C) 2016
+ * Author: Chen-Yu Tsai <wens@csie.org>
+ *
+ * Based on assembly code by Marc Zyngier <marc.zyngier@arm.com>,
+ * which was based on code by Carl van Schaik <carl@ok-labs.com>.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+#include <config.h>
+#include <common.h>
+
+#include <asm/arch/cpu.h>
+#include <asm/arch/cpucfg.h>
+#include <asm/arch/prcm.h>
+#include <asm/armv7.h>
+#include <asm/gic.h>
+#include <asm/io.h>
+#include <asm/psci.h>
+#include <asm/system.h>
+
+#include <linux/bitops.h>
+
+#define __secure __attribute__ ((section ("._secure.text")))
+#define __irq __attribute__ ((interrupt ("IRQ")))
+
+#define GICD_BASE (SUNXI_GIC400_BASE + GIC_DIST_OFFSET)
+#define GICC_BASE (SUNXI_GIC400_BASE + GIC_CPU_OFFSET_A15)
+
+static void __secure cp15_write_cntp_tval(u32 tval)
+{
+ asm volatile ("mcr p15, 0, %0, c14, c2, 0" : : "r" (tval));
+}
+
+static void __secure cp15_write_cntp_ctl(u32 val)
+{
+ asm volatile ("mcr p15, 0, %0, c14, c2, 1" : : "r" (val));
+}
+
+static u32 __secure cp15_read_cntp_ctl(void)
+{
+ u32 val;
+
+ asm volatile ("mrc p15, 0, %0, c14, c2, 1" : "=r" (val));
+
+ return val;
+}
+
+#define ONE_MS (CONFIG_TIMER_CLK_FREQ / 1000)
+
+static void __secure __mdelay(u32 ms)
+{
+ u32 reg = ONE_MS * ms;
+
+ cp15_write_cntp_tval(reg);
+ ISB;
+ cp15_write_cntp_ctl(3);
+
+ do {
+ ISB;
+ reg = cp15_read_cntp_ctl();
+ } while (!(reg & BIT(2)));
+
+ cp15_write_cntp_ctl(0);
+ ISB;
+}
+
+static void __secure clamp_release(u32 __maybe_unused *clamp)
+{
+#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN7I) || \
+ defined(CONFIG_MACH_SUN8I_H3)
+ u32 tmp = 0x1ff;
+ do {
+ tmp >>= 1;
+ writel(tmp, clamp);
+ } while (tmp);
+
+ __mdelay(10);
+#endif
+}
+
+static void __secure clamp_set(u32 __maybe_unused *clamp)
+{
+#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN7I) || \
+ defined(CONFIG_MACH_SUN8I_H3)
+ writel(0xff, clamp);
+#endif
+}
+
+static void __secure sunxi_power_switch(u32 *clamp, u32 *pwroff, bool on,
+ int cpu)
+{
+ if (on) {
+ /* Release power clamp */
+ clamp_release(clamp);
+
+ /* Clear power gating */
+ clrbits_le32(pwroff, BIT(cpu));
+ } else {
+ /* Set power gating */
+ setbits_le32(pwroff, BIT(cpu));
+
+ /* Activate power clamp */
+ clamp_set(clamp);
+ }
+}
+
+#ifdef CONFIG_MACH_SUN7I
+/* sun7i (A20) is different from other single cluster SoCs */
+static void __secure sunxi_cpu_set_power(int __always_unused cpu, bool on)
+{
+ struct sunxi_cpucfg_reg *cpucfg =
+ (struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
+
+ sunxi_power_switch(&cpucfg->cpu1_pwr_clamp, &cpucfg->cpu1_pwroff,
+ on, 0);
+}
+#else /* ! CONFIG_MACH_SUN7I */
+static void __secure sunxi_cpu_set_power(int cpu, bool on)
+{
+ struct sunxi_prcm_reg *prcm =
+ (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
+
+ sunxi_power_switch(&prcm->cpu_pwr_clamp[cpu], &prcm->cpu_pwroff,
+ on, cpu);
+}
+#endif /* CONFIG_MACH_SUN7I */
+
+void __secure sunxi_cpu_power_off(u32 cpuid)
+{
+ struct sunxi_cpucfg_reg *cpucfg =
+ (struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
+ u32 cpu = cpuid & 0x3;
+
+ /* Wait for the core to enter WFI */
+ while (1) {
+ if (readl(&cpucfg->cpu[cpu].status) & BIT(2))
+ break;
+ __mdelay(1);
+ }
+
+ /* Assert reset on target CPU */
+ writel(0, &cpucfg->cpu[cpu].rst);
+
+ /* Lock CPU (Disable external debug access) */
+ clrbits_le32(&cpucfg->dbg_ctrl1, BIT(cpu));
+
+ /* Power down CPU */
+ sunxi_cpu_set_power(cpuid, false);
+
+ /* Unlock CPU (Disable external debug access) */
+ setbits_le32(&cpucfg->dbg_ctrl1, BIT(cpu));
+}
+
+static u32 __secure cp15_read_scr(void)
+{
+ u32 scr;
+
+ asm volatile ("mrc p15, 0, %0, c1, c1, 0" : "=r" (scr));
+
+ return scr;
+}
+
+static void __secure cp15_write_scr(u32 scr)
+{
+ asm volatile ("mcr p15, 0, %0, c1, c1, 0" : : "r" (scr));
+ ISB;
+}
+
+/*
+ * Although this is an FIQ handler, the FIQ is processed in monitor mode,
+ * which means there's no FIQ banked registers. This is the same as IRQ
+ * mode, so use the IRQ attribute to ask the compiler to handler entry
+ * and return.
+ */
+void __secure __irq psci_fiq_enter(void)
+{
+ u32 scr, reg, cpu;
+
+ /* Switch to secure mode */
+ scr = cp15_read_scr();
+ cp15_write_scr(scr & ~BIT(0));
+
+ /* Validate reason based on IAR and acknowledge */
+ reg = readl(GICC_BASE + GICC_IAR);
+
+ /* Skip spurious interrupts 1022 and 1023 */
+ if (reg == 1023 || reg == 1022)
+ goto out;
+
+ /* End of interrupt */
+ writel(reg, GICC_BASE + GICC_EOIR);
+ DSB;
+
+ /* Get CPU number */
+ cpu = (reg >> 10) & 0x7;
+
+ /* Power off the CPU */
+ sunxi_cpu_power_off(cpu);
+
+out:
+ /* Restore security level */
+ cp15_write_scr(scr);
+}
+
+int __secure psci_cpu_on(u32 __always_unused unused, u32 mpidr, u32 pc)
+{
+ struct sunxi_cpucfg_reg *cpucfg =
+ (struct sunxi_cpucfg_reg *)SUNXI_CPUCFG_BASE;
+ u32 cpu = (mpidr & 0x3);
+
+ /* store target PC at target CPU stack top */
+ writel(pc, psci_get_cpu_stack_top(cpu));
+ DSB;
+
+ /* Set secondary core power on PC */
+ writel((u32)&psci_cpu_entry, &cpucfg->priv0);
+
+ /* Assert reset on target CPU */
+ writel(0, &cpucfg->cpu[cpu].rst);
+
+ /* Invalidate L1 cache */
+ clrbits_le32(&cpucfg->gen_ctrl, BIT(cpu));
+
+ /* Lock CPU (Disable external debug access) */
+ clrbits_le32(&cpucfg->dbg_ctrl1, BIT(cpu));
+
+ /* Power up target CPU */
+ sunxi_cpu_set_power(cpu, true);
+
+ /* De-assert reset on target CPU */
+ writel(BIT(1) | BIT(0), &cpucfg->cpu[cpu].rst);
+
+ /* Unlock CPU (Disable external debug access) */
+ setbits_le32(&cpucfg->dbg_ctrl1, BIT(cpu));
+
+ return ARM_PSCI_RET_SUCCESS;
+}
+
+void __secure psci_cpu_off(void)
+{
+ psci_cpu_off_common();
+
+ /* Ask CPU0 via SGI15 to pull the rug... */
+ writel(BIT(16) | 15, GICD_BASE + GICD_SGIR);
+ DSB;
+
+ /* Wait to be turned off */
+ while (1)
+ wfi();
+}
+
+void __secure sunxi_gic_init(void)
+{
+ u32 reg;
+
+ /* SGI15 as Group-0 */
+ clrbits_le32(GICD_BASE + GICD_IGROUPRn, BIT(15));
+
+ /* Set SGI15 priority to 0 */
+ writeb(0, GICD_BASE + GICD_IPRIORITYRn + 15);
+
+ /* Be cool with non-secure */
+ writel(0xff, GICC_BASE + GICC_PMR);
+
+ /* Switch FIQEn on */
+ setbits_le32(GICC_BASE + GICC_CTLR, BIT(3));
+
+ reg = cp15_read_scr();
+ reg |= BIT(2); /* Enable FIQ in monitor mode */
+ reg &= ~BIT(0); /* Secure mode */
+ cp15_write_scr(reg);
+}
diff --git a/arch/arm/cpu/armv7/sunxi/psci_head.S b/arch/arm/cpu/armv7/sunxi/psci_head.S
new file mode 100644
index 0000000000..8fa823d1df
--- /dev/null
+++ b/arch/arm/cpu/armv7/sunxi/psci_head.S
@@ -0,0 +1,66 @@
+/*
+ * 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 <linux/linkage.h>
+
+#include <asm/arch-armv7/generictimer.h>
+#include <asm/gic.h>
+#include <asm/macro.h>
+#include <asm/psci.h>
+#include <asm/arch/cpu.h>
+
+/*
+ * Memory layout:
+ *
+ * SECURE_RAM to text_end :
+ * ._secure_text section
+ * text_end to ALIGN_PAGE(text_end):
+ * nothing
+ * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x1000)
+ * 1kB of stack per CPU (4 CPUs max).
+ */
+
+ .pushsection ._secure.text, "ax"
+
+ .arch_extension sec
+
+#define GICD_BASE (SUNXI_GIC400_BASE + 0x1000)
+#define GICC_BASE (SUNXI_GIC400_BASE + 0x2000)
+
+@ {r0, r1, r2, ip} from _do_nonsec_entry(kernel_entry, 0, machid, r2) in
+@ arch/arm/lib/bootm.c:boot_jump_linux() must remain unchanged across
+@ this function.
+ENTRY(psci_arch_init)
+ mov r6, lr
+ mov r7, r0
+ bl psci_get_cpu_id @ CPU ID => r0
+ bl psci_get_cpu_stack_top @ stack top => r0
+ sub r0, r0, #4 @ Save space for target PC
+ mov sp, r0
+ mov r0, r7
+ mov lr, r6
+
+ push {r0, r1, r2, ip, lr}
+ bl sunxi_gic_init
+ pop {r0, r1, r2, ip, pc}
+ENDPROC(psci_arch_init)
+
+ENTRY(psci_text_end)
+ .popsection
diff --git a/arch/arm/cpu/armv7/sunxi/psci_sun6i.S b/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
deleted file mode 100644
index 95fdb0e588..0000000000
--- a/arch/arm/cpu/armv7/sunxi/psci_sun6i.S
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * Copyright (C) 2015 - Chen-Yu Tsai
- * Author: Chen-Yu Tsai <wens@csie.org>
- *
- * Based on psci_sun7i.S by Marc Zyngier <marc.zyngier@arm.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/arch-armv7/generictimer.h>
-#include <asm/gic.h>
-#include <asm/macro.h>
-#include <asm/psci.h>
-#include <asm/arch/cpu.h>
-
-/*
- * Memory layout:
- *
- * SECURE_RAM to text_end :
- * ._secure_text section
- * text_end to ALIGN_PAGE(text_end):
- * nothing
- * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x1000)
- * 1kB of stack per CPU (4 CPUs max).
- */
-
- .pushsection ._secure.text, "ax"
-
- .arch_extension sec
-
-#define ONE_MS (CONFIG_TIMER_CLK_FREQ / 1000)
-#define TEN_MS (10 * ONE_MS)
-#define GICD_BASE (SUNXI_GIC400_BASE + 0x1000)
-#define GICC_BASE (SUNXI_GIC400_BASE + 0x2000)
-
-.globl psci_fiq_enter
-psci_fiq_enter:
- push {r0-r12}
-
- @ Switch to secure
- mrc p15, 0, r7, c1, c1, 0
- bic r8, r7, #1
- mcr p15, 0, r8, c1, c1, 0
- isb
-
- @ Validate reason based on IAR and acknowledge
- movw r8, #(GICC_BASE & 0xffff)
- movt r8, #(GICC_BASE >> 16)
- ldr r9, [r8, #GICC_IAR]
- movw r10, #0x3ff
- movt r10, #0
- cmp r9, r10 @ skip spurious interrupt 1023
- beq out
- movw r10, #0x3fe @ ...and 1022
- cmp r9, r10
- beq out
- str r9, [r8, #GICC_EOIR] @ acknowledge the interrupt
- dsb
-
- @ Compute CPU number
- lsr r9, r9, #10
- and r9, r9, #0xf
-
- movw r8, #(SUNXI_CPUCFG_BASE & 0xffff)
- movt r8, #(SUNXI_CPUCFG_BASE >> 16)
-
- @ Wait for the core to enter WFI
- lsl r11, r9, #6 @ x64
- add r11, r11, r8
-
-1: ldr r10, [r11, #0x48]
- tst r10, #(1 << 2)
- bne 2f
- timer_wait r10, ONE_MS
- b 1b
-
- @ Reset CPU
-2: mov r10, #0
- str r10, [r11, #0x40]
-
- @ Lock CPU
- mov r10, #1
- lsl r11, r10, r9 @ r11 is now CPU mask
- ldr r10, [r8, #0x1e4]
- bic r10, r10, r11
- str r10, [r8, #0x1e4]
-
- movw r8, #(SUNXI_PRCM_BASE & 0xffff)
- movt r8, #(SUNXI_PRCM_BASE >> 16)
-
- @ Set power gating
- ldr r10, [r8, #0x100]
- orr r10, r10, r11
- str r10, [r8, #0x100]
- timer_wait r10, ONE_MS
-
-#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN8I_H3)
- @ Activate power clamp
- lsl r12, r9, #2 @ x4
- add r12, r12, r8
- mov r10, #0xff
- str r10, [r12, #0x140]
-#endif
-
- movw r8, #(SUNXI_CPUCFG_BASE & 0xffff)
- movt r8, #(SUNXI_CPUCFG_BASE >> 16)
-
- @ Unlock CPU
- ldr r10, [r8, #0x1e4]
- orr r10, r10, r11
- str r10, [r8, #0x1e4]
-
- @ Restore security level
-out: mcr p15, 0, r7, c1, c1, 0
-
- pop {r0-r12}
- subs pc, lr, #4
-
- @ r1 = target CPU
- @ r2 = target PC
-.globl psci_cpu_on
-psci_cpu_on:
- push {lr}
-
- mov r0, r1
- bl psci_get_cpu_stack_top @ get stack top of target CPU
- str r2, [r0] @ store target PC at stack top
- 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
-
- ldr r6, =psci_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] @ CPUCFG_GEN_CTRL_REG
- bic r6, r6, r4
- str r6, [r0, #0x184]
-
- @ Lock CPU (Disable external debug access)
- ldr r6, [r0, #0x1e4] @ CPUCFG_DBG_CTL1_REG
- bic r6, r6, r4
- str r6, [r0, #0x1e4]
-
- movw r0, #(SUNXI_PRCM_BASE & 0xffff)
- movt r0, #(SUNXI_PRCM_BASE >> 16)
-
-#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN8I_H3)
- @ Release power clamp
- lsl r5, r1, #2 @ 1 register per CPU
- add r5, r5, r0 @ PRCM
- movw r6, #0x1ff
- movt r6, #0
-1: lsrs r6, r6, #1
- str r6, [r5, #0x140] @ CPUx_PWR_CLAMP
- bne 1b
-#endif
-
- timer_wait r6, TEN_MS
-
- @ Clear power gating
- ldr r6, [r0, #0x100] @ CPU_PWROFF_GATING
- bic r6, r6, r4
- str r6, [r0, #0x100]
-
- @ re-calculate CPU control register address
- movw r0, #(SUNXI_CPUCFG_BASE & 0xffff)
- movt r0, #(SUNXI_CPUCFG_BASE >> 16)
-
- @ Deassert reset on target CPU
- mov r6, #3
- 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]
-
- @ Unlock CPU (Enable external debug access)
- ldr r6, [r0, #0x1e4] @ CPUCFG_DBG_CTL1_REG
- orr r6, r6, r4
- str r6, [r0, #0x1e4]
-
- mov r0, #ARM_PSCI_RET_SUCCESS @ Return PSCI_RET_SUCCESS
- pop {pc}
-
-.globl psci_cpu_off
-psci_cpu_off:
- bl psci_cpu_off_common
-
- @ Ask CPU0 to pull the rug...
- movw r0, #(GICD_BASE & 0xffff)
- movt r0, #(GICD_BASE >> 16)
- movw r1, #15 @ SGI15
- movt r1, #1 @ Target is CPU0
- str r1, [r0, #GICD_SGIR]
- dsb
-
-1: wfi
- b 1b
-
-.globl psci_arch_init
-psci_arch_init:
- mov r6, lr
-
- movw r4, #(GICD_BASE & 0xffff)
- movt r4, #(GICD_BASE >> 16)
-
- ldr r5, [r4, #GICD_IGROUPRn]
- bic r5, r5, #(1 << 15) @ SGI15 as Group-0
- str r5, [r4, #GICD_IGROUPRn]
-
- mov r5, #0 @ Set SGI15 priority to 0
- strb r5, [r4, #(GICD_IPRIORITYRn + 15)]
-
- add r4, r4, #0x1000 @ GICC address
-
- mov r5, #0xff
- str r5, [r4, #GICC_PMR] @ Be cool with non-secure
-
- ldr r5, [r4, #GICC_CTLR]
- orr r5, r5, #(1 << 3) @ Switch FIQEn on
- str r5, [r4, #GICC_CTLR]
-
- mrc p15, 0, r5, c1, c1, 0 @ Read SCR
- orr r5, r5, #4 @ Enable FIQ in monitor mode
- bic r5, r5, #1 @ Secure mode
- mcr p15, 0, r5, c1, c1, 0 @ Write SCR
- isb
-
- bl psci_get_cpu_id @ CPU ID => r0
- bl psci_get_cpu_stack_top @ stack top => r0
- mov sp, r0
-
- bx r6
-
- .globl psci_text_end
-psci_text_end:
- .popsection
diff --git a/arch/arm/cpu/armv7/sunxi/psci_sun7i.S b/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
deleted file mode 100644
index 87bbd725f0..0000000000
--- a/arch/arm/cpu/armv7/sunxi/psci_sun7i.S
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * 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/arch-armv7/generictimer.h>
-#include <asm/gic.h>
-#include <asm/macro.h>
-#include <asm/psci.h>
-#include <asm/arch/cpu.h>
-
-/*
- * Memory layout:
- *
- * SECURE_RAM to text_end :
- * ._secure_text section
- * text_end to ALIGN_PAGE(text_end):
- * nothing
- * ALIGN_PAGE(text_end) to ALIGN_PAGE(text_end) + 0x1000)
- * 1kB of stack per CPU (4 CPUs max).
- */
-
- .pushsection ._secure.text, "ax"
-
- .arch_extension sec
-
-#define ONE_MS (CONFIG_TIMER_CLK_FREQ / 1000)
-#define TEN_MS (10 * ONE_MS)
-#define GICD_BASE (SUNXI_GIC400_BASE + 0x1000)
-#define GICC_BASE (SUNXI_GIC400_BASE + 0x2000)
-
-.globl psci_fiq_enter
-psci_fiq_enter:
- push {r0-r12}
-
- @ Switch to secure
- mrc p15, 0, r7, c1, c1, 0
- bic r8, r7, #1
- mcr p15, 0, r8, c1, c1, 0
- isb
-
- @ Validate reason based on IAR and acknowledge
- movw r8, #(GICC_BASE & 0xffff)
- movt r8, #(GICC_BASE >> 16)
- ldr r9, [r8, #GICC_IAR]
- movw r10, #0x3ff
- movt r10, #0
- cmp r9, r10 @ skip spurious interrupt 1023
- beq out
- movw r10, #0x3fe @ ...and 1022
- cmp r9, r10
- beq out
- str r9, [r8, #GICC_EOIR] @ acknowledge the interrupt
- dsb
-
- @ Compute CPU number
- lsr r9, r9, #10
- and r9, r9, #0xf
-
- movw r8, #(SUNXI_CPUCFG_BASE & 0xffff)
- movt r8, #(SUNXI_CPUCFG_BASE >> 16)
-
- @ Wait for the core to enter WFI
- lsl r11, r9, #6 @ x64
- add r11, r11, r8
-
-1: ldr r10, [r11, #0x48]
- tst r10, #(1 << 2)
- bne 2f
- timer_wait r10, ONE_MS
- b 1b
-
- @ Reset CPU
-2: mov r10, #0
- str r10, [r11, #0x40]
-
- @ Lock CPU
- mov r10, #1
- lsl r9, r10, r9 @ r9 is now CPU mask
- ldr r10, [r8, #0x1e4]
- bic r10, r10, r9
- str r10, [r8, #0x1e4]
-
- @ Set power gating
- ldr r10, [r8, #0x1b4]
- orr r10, r10, #1
- str r10, [r8, #0x1b4]
- timer_wait r10, ONE_MS
-
- @ Activate power clamp
- mov r10, #1
-1: str r10, [r8, #0x1b0]
- lsl r10, r10, #1
- orr r10, r10, #1
- tst r10, #0x100
- beq 1b
-
- @ Restore security level
-out: mcr p15, 0, r7, c1, c1, 0
-
- pop {r0-r12}
- subs pc, lr, #4
-
- @ r1 = target CPU
- @ r2 = target PC
-.globl psci_cpu_on
-psci_cpu_on:
- push {lr}
-
- mov r0, r1
- bl psci_get_cpu_stack_top @ get stack top of target CPU
- str r2, [r0] @ store target PC at stack top
- 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
-
- ldr r6, =psci_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] @ CPUCFG_GEN_CTRL_REG
- bic r6, r6, r4
- str r6, [r0, #0x184]
-
- @ Lock CPU (Disable external debug access)
- ldr r6, [r0, #0x1e4] @ CPUCFG_DBG_CTL1_REG
- 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] @ CPU1_PWR_CLAMP
- bne 1b
-
- timer_wait r1, TEN_MS
-
- @ Clear power gating
- ldr r6, [r0, #0x1b4] @ CPU1_PWROFF_REG
- bic r6, r6, #1
- str r6, [r0, #0x1b4]
-
- @ Deassert reset on target CPU
- mov r6, #3
- str r6, [r5]
-
- @ Unlock CPU (Enable external debug access)
- ldr r6, [r0, #0x1e4] @ CPUCFG_DBG_CTL1_REG
- orr r6, r6, r4
- str r6, [r0, #0x1e4]
-
- mov r0, #ARM_PSCI_RET_SUCCESS @ Return PSCI_RET_SUCCESS
- pop {pc}
-
-.globl psci_cpu_off
-psci_cpu_off:
- bl psci_cpu_off_common
-
- @ Ask CPU0 to pull the rug...
- movw r0, #(GICD_BASE & 0xffff)
- movt r0, #(GICD_BASE >> 16)
- movw r1, #15 @ SGI15
- movt r1, #1 @ Target is CPU0
- str r1, [r0, #GICD_SGIR]
- dsb
-
-1: wfi
- b 1b
-
-.globl psci_arch_init
-psci_arch_init:
- mov r6, lr
-
- movw r4, #(GICD_BASE & 0xffff)
- movt r4, #(GICD_BASE >> 16)
-
- ldr r5, [r4, #GICD_IGROUPRn]
- bic r5, r5, #(1 << 15) @ SGI15 as Group-0
- str r5, [r4, #GICD_IGROUPRn]
-
- mov r5, #0 @ Set SGI15 priority to 0
- strb r5, [r4, #(GICD_IPRIORITYRn + 15)]
-
- add r4, r4, #0x1000 @ GICC address
-
- mov r5, #0xff
- str r5, [r4, #GICC_PMR] @ Be cool with non-secure
-
- ldr r5, [r4, #GICC_CTLR]
- orr r5, r5, #(1 << 3) @ Switch FIQEn on
- str r5, [r4, #GICC_CTLR]
-
- mrc p15, 0, r5, c1, c1, 0 @ Read SCR
- orr r5, r5, #4 @ Enable FIQ in monitor mode
- bic r5, r5, #1 @ Secure mode
- mcr p15, 0, r5, c1, c1, 0 @ Write SCR
- isb
-
- bl psci_get_cpu_id @ CPU ID => r0
- bl psci_get_cpu_stack_top @ stack top => r0
- mov sp, r0
-
- bx r6
-
- .globl psci_text_end
-psci_text_end:
- .popsection
generated by cgit (git 2.34.1) at 2024-12-25 16:39:40 +0000