openwrtv4/package/boot/uboot-sunxi/patches/002-uboot-jwrdegoede-psci-support.patch

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From 86f31982ac62e80fe586cad2e0a49a7b22e3d4ee Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:07 +0000
Subject: [PATCH] ARM: HYP/non-sec: move switch to non-sec to the last boot
phase
Having the switch to non-secure in the "prep" phase is causing
all kind of troubles, as that stage can be called multiple times.
Instead, move the switch to non-secure to the last possible phase,
when there is no turning back anymore.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/lib/bootm.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 47ee070..10634a4 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -242,7 +242,6 @@ static void boot_prep_linux(bootm_headers_t *images)
printf("FDT and ATAGS support not compiled in - hanging\n");
hang();
}
- do_nonsec_virt_switch();
}
/* Subcommand: GO */
@@ -287,8 +286,10 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
else
r2 = gd->bd->bi_boot_params;
- if (!fake)
+ if (!fake) {
+ do_nonsec_virt_switch();
kernel_entry(0, machid, r2);
+ }
#endif
}
From c26d288f6cbc6d53219001d42476f314c403257b Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:08 +0000
Subject: [PATCH] ARM: HYP/non-sec: add a barrier after setting SCR.NS==1
A CP15 instruction execution can be reordered, requiring an
isb to be sure it is executed in program order.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/cpu/armv7/nonsec_virt.S | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/cpu/armv7/nonsec_virt.S b/arch/arm/cpu/armv7/nonsec_virt.S
index 6367e09..12de5c2 100644
--- a/arch/arm/cpu/armv7/nonsec_virt.S
+++ b/arch/arm/cpu/armv7/nonsec_virt.S
@@ -46,6 +46,7 @@ _secure_monitor:
#endif
mcr p15, 0, r1, c1, c1, 0 @ write SCR (with NS bit set)
+ isb
#ifdef CONFIG_ARMV7_VIRT
mrceq p15, 0, r0, c12, c0, 1 @ get MVBAR value
From 06feeea3c84cc58ff3d5c19f6a430886495f86ce Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:09 +0000
Subject: [PATCH] ARM: non-sec: reset CNTVOFF to zero
Before switching to non-secure, make sure that CNTVOFF is set
to zero on all CPUs. Otherwise, kernel running in non-secure
without HYP enabled (hence using virtual timers) may observe
timers that are not synchronized, effectively seeing time
going backward...
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/cpu/armv7/nonsec_virt.S | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7/nonsec_virt.S b/arch/arm/cpu/armv7/nonsec_virt.S
index 12de5c2..b5c946f 100644
--- a/arch/arm/cpu/armv7/nonsec_virt.S
+++ b/arch/arm/cpu/armv7/nonsec_virt.S
@@ -38,10 +38,10 @@ _secure_monitor:
bic r1, r1, #0x4e @ clear IRQ, FIQ, EA, nET bits
orr r1, r1, #0x31 @ enable NS, AW, FW bits
-#ifdef CONFIG_ARMV7_VIRT
mrc p15, 0, r0, c0, c1, 1 @ read ID_PFR1
and r0, r0, #CPUID_ARM_VIRT_MASK @ mask virtualization bits
cmp r0, #(1 << CPUID_ARM_VIRT_SHIFT)
+#ifdef CONFIG_ARMV7_VIRT
orreq r1, r1, #0x100 @ allow HVC instruction
#endif
@@ -52,7 +52,14 @@ _secure_monitor:
mrceq p15, 0, r0, c12, c0, 1 @ get MVBAR value
mcreq p15, 4, r0, c12, c0, 0 @ write HVBAR
#endif
+ bne 1f
+ @ Reset CNTVOFF to 0 before leaving monitor mode
+ mrc p15, 0, r0, c0, c1, 1 @ read ID_PFR1
+ ands r0, r0, #CPUID_ARM_GENTIMER_MASK @ test arch timer bits
+ movne r0, #0
+ mcrrne p15, 4, r0, r0, c14 @ Reset CNTVOFF to zero
+1:
movs pc, lr @ return to non-secure SVC
_hyp_trap:
From 054bcf5147ff5a20298bce5b3bdfbf3e1c797594 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:10 +0000
Subject: [PATCH] ARM: add missing HYP mode constant
In order to be able to use the various mode constants (far more
readable than random hex values), add the missing HYP and A
values.
Also update arm/lib/interrupts.c to display HYP instead of an
unknown value.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/include/asm/proc-armv/ptrace.h | 2 ++
arch/arm/lib/interrupts.c | 2 +-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/proc-armv/ptrace.h b/arch/arm/include/asm/proc-armv/ptrace.h
index 21aef58..71df5a9 100644
--- a/arch/arm/include/asm/proc-armv/ptrace.h
+++ b/arch/arm/include/asm/proc-armv/ptrace.h
@@ -38,12 +38,14 @@ struct pt_regs {
#define IRQ_MODE 0x12
#define SVC_MODE 0x13
#define ABT_MODE 0x17
+#define HYP_MODE 0x1a
#define UND_MODE 0x1b
#define SYSTEM_MODE 0x1f
#define MODE_MASK 0x1f
#define T_BIT 0x20
#define F_BIT 0x40
#define I_BIT 0x80
+#define A_BIT 0x100
#define CC_V_BIT (1 << 28)
#define CC_C_BIT (1 << 29)
#define CC_Z_BIT (1 << 30)
diff --git a/arch/arm/lib/interrupts.c b/arch/arm/lib/interrupts.c
index 758b013..f6b7c03 100644
--- a/arch/arm/lib/interrupts.c
+++ b/arch/arm/lib/interrupts.c
@@ -103,7 +103,7 @@ void show_regs (struct pt_regs *regs)
"UK12_26", "UK13_26", "UK14_26", "UK15_26",
"USER_32", "FIQ_32", "IRQ_32", "SVC_32",
"UK4_32", "UK5_32", "UK6_32", "ABT_32",
- "UK8_32", "UK9_32", "UK10_32", "UND_32",
+ "UK8_32", "UK9_32", "HYP_32", "UND_32",
"UK12_32", "UK13_32", "UK14_32", "SYS_32",
};
From 213a8d9b7e613210d3c7d8b99c95b454ad0527d8 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:11 +0000
Subject: [PATCH] ARM: HYP/non-sec: add separate section for secure code
In anticipation of refactoring the HYP/non-secure code to run
from secure RAM, add a new linker section that will contain that
code.
Nothing is using it just yet.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/config.mk | 2 +-
arch/arm/cpu/u-boot.lds | 30 ++++++++++++++++++++++++++++++
arch/arm/lib/sections.c | 2 ++
3 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/arch/arm/config.mk b/arch/arm/config.mk
index 66ecc2e..2bdfca5 100644
--- a/arch/arm/config.mk
+++ b/arch/arm/config.mk
@@ -113,7 +113,7 @@ endif
ifdef CONFIG_ARM64
OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list -j .rela.dyn
else
-OBJCOPYFLAGS += -j .text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn
+OBJCOPYFLAGS += -j .text -j .secure_text -j .rodata -j .hash -j .data -j .got.plt -j .u_boot_list -j .rel.dyn
endif
ifneq ($(CONFIG_IMX_CONFIG),)
diff --git a/arch/arm/cpu/u-boot.lds b/arch/arm/cpu/u-boot.lds
index 33c1f99..f45885d 100644
--- a/arch/arm/cpu/u-boot.lds
+++ b/arch/arm/cpu/u-boot.lds
@@ -7,6 +7,8 @@
* SPDX-License-Identifier: GPL-2.0+
*/
+#include <config.h>
+
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
@@ -22,6 +24,34 @@ SECTIONS
*(.text*)
}
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT) || defined(CONFIG_ARMV7_PSCI)
+
+#ifndef CONFIG_ARMV7_SECURE_BASE
+#define CONFIG_ARMV7_SECURE_BASE
+#endif
+
+ .__secure_start : {
+ . = ALIGN(0x1000);
+ *(.__secure_start)
+ }
+
+ .secure_text CONFIG_ARMV7_SECURE_BASE :
+ AT(ADDR(.__secure_start) + SIZEOF(.__secure_start))
+ {
+ *(._secure.text)
+ }
+
+ . = LOADADDR(.__secure_start) +
+ SIZEOF(.__secure_start) +
+ SIZEOF(.secure_text);
+
+ __secure_end_lma = .;
+ .__secure_end : AT(__secure_end_lma) {
+ *(.__secure_end)
+ LONG(0x1d1071c); /* Must output something to reset LMA */
+ }
+#endif
+
. = ALIGN(4);
.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
diff --git a/arch/arm/lib/sections.c b/arch/arm/lib/sections.c
index 5b30bcb..a1205c3 100644
--- a/arch/arm/lib/sections.c
+++ b/arch/arm/lib/sections.c
@@ -25,4 +25,6 @@ char __image_copy_start[0] __attribute__((section(".__image_copy_start")));
char __image_copy_end[0] __attribute__((section(".__image_copy_end")));
char __rel_dyn_start[0] __attribute__((section(".__rel_dyn_start")));
char __rel_dyn_end[0] __attribute__((section(".__rel_dyn_end")));
+char __secure_start[0] __attribute__((section(".__secure_start")));
+char __secure_end[0] __attribute__((section(".__secure_end")));
char _end[0] __attribute__((section(".__end")));
From d7ebd8f57e84ea92ef0cf55080f0acec9c6d1ace Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:12 +0000
Subject: [PATCH] ARM: HYP/non-sec: allow relocation to secure RAM
The current non-sec switching code suffers from one major issue:
it cannot run in secure RAM, as a large part of u-boot still needs
to be run while we're switched to non-secure.
This patch reworks the whole HYP/non-secure strategy by:
- making sure the secure code is the *last* thing u-boot executes
before entering the payload
- performing an exception return from secure mode directly into
the payload
- allowing the code to be dynamically relocated to secure RAM
before switching to non-secure.
This involves quite a bit of horrible code, specially as u-boot
relocation is quite primitive.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/cpu/armv7/nonsec_virt.S | 161 +++++++++++++++++++--------------------
arch/arm/cpu/armv7/virt-v7.c | 59 +++++---------
arch/arm/include/asm/armv7.h | 10 ++-
arch/arm/include/asm/secure.h | 26 +++++++
arch/arm/lib/bootm.c | 22 +++---
5 files changed, 138 insertions(+), 140 deletions(-)
create mode 100644 arch/arm/include/asm/secure.h
diff --git a/arch/arm/cpu/armv7/nonsec_virt.S b/arch/arm/cpu/armv7/nonsec_virt.S
index b5c946f..2a43e3c 100644
--- a/arch/arm/cpu/armv7/nonsec_virt.S
+++ b/arch/arm/cpu/armv7/nonsec_virt.S
@@ -10,10 +10,13 @@
#include <linux/linkage.h>
#include <asm/gic.h>
#include <asm/armv7.h>
+#include <asm/proc-armv/ptrace.h>
.arch_extension sec
.arch_extension virt
+ .pushsection ._secure.text, "ax"
+
.align 5
/* the vector table for secure state and HYP mode */
_monitor_vectors:
@@ -22,51 +25,86 @@ _monitor_vectors:
adr pc, _secure_monitor
.word 0
.word 0
- adr pc, _hyp_trap
+ .word 0
.word 0
.word 0
+.macro is_cpu_virt_capable tmp
+ mrc p15, 0, \tmp, c0, c1, 1 @ read ID_PFR1
+ and \tmp, \tmp, #CPUID_ARM_VIRT_MASK @ mask virtualization bits
+ cmp \tmp, #(1 << CPUID_ARM_VIRT_SHIFT)
+.endm
+
/*
* secure monitor handler
* U-boot calls this "software interrupt" in start.S
* This is executed on a "smc" instruction, we use a "smc #0" to switch
* to non-secure state.
- * We use only r0 and r1 here, due to constraints in the caller.
+ * r0, r1, r2: passed to the callee
+ * ip: target PC
*/
_secure_monitor:
- mrc p15, 0, r1, c1, c1, 0 @ read SCR
- bic r1, r1, #0x4e @ clear IRQ, FIQ, EA, nET bits
- orr r1, r1, #0x31 @ enable NS, AW, FW bits
+ mrc p15, 0, r5, c1, c1, 0 @ read SCR
+ bic r5, r5, #0x4e @ clear IRQ, FIQ, EA, nET bits
+ orr r5, r5, #0x31 @ enable NS, AW, FW bits
- mrc p15, 0, r0, c0, c1, 1 @ read ID_PFR1
- and r0, r0, #CPUID_ARM_VIRT_MASK @ mask virtualization bits
- cmp r0, #(1 << CPUID_ARM_VIRT_SHIFT)
+ mov r6, #SVC_MODE @ default mode is SVC
+ is_cpu_virt_capable r4
#ifdef CONFIG_ARMV7_VIRT
- orreq r1, r1, #0x100 @ allow HVC instruction
+ orreq r5, r5, #0x100 @ allow HVC instruction
+ moveq r6, #HYP_MODE @ Enter the kernel as HYP
#endif
- mcr p15, 0, r1, c1, c1, 0 @ write SCR (with NS bit set)
+ mcr p15, 0, r5, c1, c1, 0 @ write SCR (with NS bit set)
isb
-#ifdef CONFIG_ARMV7_VIRT
- mrceq p15, 0, r0, c12, c0, 1 @ get MVBAR value
- mcreq p15, 4, r0, c12, c0, 0 @ write HVBAR
-#endif
bne 1f
@ Reset CNTVOFF to 0 before leaving monitor mode
- mrc p15, 0, r0, c0, c1, 1 @ read ID_PFR1
- ands r0, r0, #CPUID_ARM_GENTIMER_MASK @ test arch timer bits
- movne r0, #0
- mcrrne p15, 4, r0, r0, c14 @ Reset CNTVOFF to zero
+ mrc p15, 0, r4, c0, c1, 1 @ read ID_PFR1
+ ands r4, r4, #CPUID_ARM_GENTIMER_MASK @ test arch timer bits
+ movne r4, #0
+ mcrrne p15, 4, r4, r4, c14 @ Reset CNTVOFF to zero
1:
- movs pc, lr @ return to non-secure SVC
-
-_hyp_trap:
- mrs lr, elr_hyp @ for older asm: .byte 0x00, 0xe3, 0x0e, 0xe1
- mov pc, lr @ do no switch modes, but
- @ return to caller
-
+ mov lr, ip
+ mov ip, #(F_BIT | I_BIT | A_BIT) @ Set A, I and F
+ tst lr, #1 @ Check for Thumb PC
+ orrne ip, ip, #T_BIT @ Set T if Thumb
+ orr ip, ip, r6 @ Slot target mode in
+ msr spsr_cxfs, ip @ Set full SPSR
+ movs pc, lr @ ERET to non-secure
+
+ENTRY(_do_nonsec_entry)
+ mov ip, r0
+ mov r0, r1
+ mov r1, r2
+ mov r2, r3
+ smc #0
+ENDPROC(_do_nonsec_entry)
+
+.macro get_cbar_addr addr
+#ifdef CONFIG_ARM_GIC_BASE_ADDRESS
+ ldr \addr, =CONFIG_ARM_GIC_BASE_ADDRESS
+#else
+ mrc p15, 4, \addr, c15, c0, 0 @ read CBAR
+ bfc \addr, #0, #15 @ clear reserved bits
+#endif
+.endm
+
+.macro get_gicd_addr addr
+ get_cbar_addr \addr
+ add \addr, \addr, #GIC_DIST_OFFSET @ GIC dist i/f offset
+.endm
+
+.macro get_gicc_addr addr, tmp
+ get_cbar_addr \addr
+ is_cpu_virt_capable \tmp
+ movne \tmp, #GIC_CPU_OFFSET_A9 @ GIC CPU offset for A9
+ moveq \tmp, #GIC_CPU_OFFSET_A15 @ GIC CPU offset for A15/A7
+ add \addr, \addr, \tmp
+.endm
+
+#ifndef CONFIG_ARMV7_PSCI
/*
* Secondary CPUs start here and call the code for the core specific parts
* of the non-secure and HYP mode transition. The GIC distributor specific
@@ -74,31 +112,21 @@ _hyp_trap:
* Then they go back to wfi and wait to be woken up by the kernel again.
*/
ENTRY(_smp_pen)
- mrs r0, cpsr
- orr r0, r0, #0xc0
- msr cpsr, r0 @ disable interrupts
- ldr r1, =_start
- mcr p15, 0, r1, c12, c0, 0 @ set VBAR
+ cpsid i
+ cpsid f
bl _nonsec_init
- mov r12, r0 @ save GICC address
-#ifdef CONFIG_ARMV7_VIRT
- bl _switch_to_hyp
-#endif
-
- ldr r1, [r12, #GICC_IAR] @ acknowledge IPI
- str r1, [r12, #GICC_EOIR] @ signal end of interrupt
adr r0, _smp_pen @ do not use this address again
b smp_waitloop @ wait for IPIs, board specific
ENDPROC(_smp_pen)
+#endif
/*
* Switch a core to non-secure state.
*
* 1. initialize the GIC per-core interface
* 2. allow coprocessor access in non-secure modes
- * 3. switch the cpu mode (by calling "smc #0")
*
* Called from smp_pen by secondary cores and directly by the BSP.
* Do not assume that the stack is available and only use registers
@@ -108,38 +136,23 @@ ENDPROC(_smp_pen)
* though, but we check this in C before calling this function.
*/
ENTRY(_nonsec_init)
-#ifdef CONFIG_ARM_GIC_BASE_ADDRESS
- ldr r2, =CONFIG_ARM_GIC_BASE_ADDRESS
-#else
- mrc p15, 4, r2, c15, c0, 0 @ read CBAR
- bfc r2, #0, #15 @ clear reserved bits
-#endif
- add r3, r2, #GIC_DIST_OFFSET @ GIC dist i/f offset
+ get_gicd_addr r3
+
mvn r1, #0 @ all bits to 1
str r1, [r3, #GICD_IGROUPRn] @ allow private interrupts
- mrc p15, 0, r0, c0, c0, 0 @ read MIDR
- ldr r1, =MIDR_PRIMARY_PART_MASK
- and r0, r0, r1 @ mask out variant and revision
+ get_gicc_addr r3, r1
- ldr r1, =MIDR_CORTEX_A7_R0P0 & MIDR_PRIMARY_PART_MASK
- cmp r0, r1 @ check for Cortex-A7
-
- ldr r1, =MIDR_CORTEX_A15_R0P0 & MIDR_PRIMARY_PART_MASK
- cmpne r0, r1 @ check for Cortex-A15
-
- movne r1, #GIC_CPU_OFFSET_A9 @ GIC CPU offset for A9
- moveq r1, #GIC_CPU_OFFSET_A15 @ GIC CPU offset for A15/A7
- add r3, r2, r1 @ r3 = GIC CPU i/f addr
-
- mov r1, #1 @ set GICC_CTLR[enable]
+ mov r1, #3 @ Enable both groups
str r1, [r3, #GICC_CTLR] @ and clear all other bits
mov r1, #0xff
str r1, [r3, #GICC_PMR] @ set priority mask register
+ mrc p15, 0, r0, c1, c1, 2
movw r1, #0x3fff
- movt r1, #0x0006
- mcr p15, 0, r1, c1, c1, 2 @ NSACR = all copros to non-sec
+ movt r1, #0x0004
+ orr r0, r0, r1
+ mcr p15, 0, r0, c1, c1, 2 @ NSACR = all copros to non-sec
/* The CNTFRQ register of the generic timer needs to be
* programmed in secure state. Some primary bootloaders / firmware
@@ -157,21 +170,9 @@ ENTRY(_nonsec_init)
adr r1, _monitor_vectors
mcr p15, 0, r1, c12, c0, 1 @ set MVBAR to secure vectors
-
- mrc p15, 0, ip, c12, c0, 0 @ save secure copy of VBAR
-
isb
- smc #0 @ call into MONITOR mode
-
- mcr p15, 0, ip, c12, c0, 0 @ write non-secure copy of VBAR
-
- mov r1, #1
- str r1, [r3, #GICC_CTLR] @ enable non-secure CPU i/f
- add r2, r2, #GIC_DIST_OFFSET
- str r1, [r2, #GICD_CTLR] @ allow private interrupts
mov r0, r3 @ return GICC address
-
bx lr
ENDPROC(_nonsec_init)
@@ -183,18 +184,10 @@ ENTRY(smp_waitloop)
ldr r1, [r1]
cmp r0, r1 @ make sure we dont execute this code
beq smp_waitloop @ again (due to a spurious wakeup)
- mov pc, r1
+ mov r0, r1
+ b _do_nonsec_entry
ENDPROC(smp_waitloop)
.weak smp_waitloop
#endif
-ENTRY(_switch_to_hyp)
- mov r0, lr
- mov r1, sp @ save SVC copy of LR and SP
- isb
- hvc #0 @ for older asm: .byte 0x70, 0x00, 0x40, 0xe1
- mov sp, r1
- mov lr, r0 @ restore SVC copy of LR and SP
-
- bx lr
-ENDPROC(_switch_to_hyp)
+ .popsection
diff --git a/arch/arm/cpu/armv7/virt-v7.c b/arch/arm/cpu/armv7/virt-v7.c
index 2cd604f..6500030 100644
--- a/arch/arm/cpu/armv7/virt-v7.c
+++ b/arch/arm/cpu/armv7/virt-v7.c
@@ -13,17 +13,10 @@
#include <asm/armv7.h>
#include <asm/gic.h>
#include <asm/io.h>
+#include <asm/secure.h>
unsigned long gic_dist_addr;
-static unsigned int read_cpsr(void)
-{
- unsigned int reg;
-
- asm volatile ("mrs %0, cpsr\n" : "=r" (reg));
- return reg;
-}
-
static unsigned int read_id_pfr1(void)
{
unsigned int reg;
@@ -72,6 +65,18 @@ static unsigned long get_gicd_base_address(void)
#endif
}
+static void relocate_secure_section(void)
+{
+#ifdef CONFIG_ARMV7_SECURE_BASE
+ size_t sz = __secure_end - __secure_start;
+
+ memcpy((void *)CONFIG_ARMV7_SECURE_BASE, __secure_start, sz);
+ flush_dcache_range(CONFIG_ARMV7_SECURE_BASE,
+ CONFIG_ARMV7_SECURE_BASE + sz + 1);
+ invalidate_icache_all();
+#endif
+}
+
static void kick_secondary_cpus_gic(unsigned long gicdaddr)
{
/* kick all CPUs (except this one) by writing to GICD_SGIR */
@@ -83,35 +88,7 @@ void __weak smp_kick_all_cpus(void)
kick_secondary_cpus_gic(gic_dist_addr);
}
-int armv7_switch_hyp(void)
-{
- unsigned int reg;
-
- /* check whether we are in HYP mode already */
- if ((read_cpsr() & 0x1f) == 0x1a) {
- debug("CPU already in HYP mode\n");
- return 0;
- }
-
- /* check whether the CPU supports the virtualization extensions */
- reg = read_id_pfr1();
- if ((reg & CPUID_ARM_VIRT_MASK) != 1 << CPUID_ARM_VIRT_SHIFT) {
- printf("HYP mode: Virtualization extensions not implemented.\n");
- return -1;
- }
-
- /* call the HYP switching code on this CPU also */
- _switch_to_hyp();
-
- if ((read_cpsr() & 0x1F) != 0x1a) {
- printf("HYP mode: switch not successful.\n");
- return -1;
- }
-
- return 0;
-}
-
-int armv7_switch_nonsec(void)
+int armv7_init_nonsec(void)
{
unsigned int reg;
unsigned itlinesnr, i;
@@ -147,11 +124,13 @@ int armv7_switch_nonsec(void)
for (i = 1; i <= itlinesnr; i++)
writel((unsigned)-1, gic_dist_addr + GICD_IGROUPRn + 4 * i);
- smp_set_core_boot_addr((unsigned long)_smp_pen, -1);
+#ifndef CONFIG_ARMV7_PSCI
+ smp_set_core_boot_addr((unsigned long)secure_ram_addr(_smp_pen), -1);
smp_kick_all_cpus();
+#endif
/* call the non-sec switching code on this CPU also */
- _nonsec_init();
-
+ relocate_secure_section();
+ secure_ram_addr(_nonsec_init)();
return 0;
}
diff --git a/arch/arm/include/asm/armv7.h b/arch/arm/include/asm/armv7.h
index 395444e..11476dd 100644
--- a/arch/arm/include/asm/armv7.h
+++ b/arch/arm/include/asm/armv7.h
@@ -78,13 +78,17 @@ void v7_outer_cache_inval_range(u32 start, u32 end);
#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
-int armv7_switch_nonsec(void);
-int armv7_switch_hyp(void);
+int armv7_init_nonsec(void);
/* defined in assembly file */
unsigned int _nonsec_init(void);
+void _do_nonsec_entry(void *target_pc, unsigned long r0,
+ unsigned long r1, unsigned long r2);
void _smp_pen(void);
-void _switch_to_hyp(void);
+
+extern char __secure_start[];
+extern char __secure_end[];
+
#endif /* CONFIG_ARMV7_NONSEC || CONFIG_ARMV7_VIRT */
#endif /* ! __ASSEMBLY__ */
diff --git a/arch/arm/include/asm/secure.h b/arch/arm/include/asm/secure.h
new file mode 100644
index 0000000..effdb18
--- /dev/null
+++ b/arch/arm/include/asm/secure.h
@@ -0,0 +1,26 @@
+#ifndef __ASM_SECURE_H
+#define __ASM_SECURE_H
+
+#include <config.h>
+
+#ifdef CONFIG_ARMV7_SECURE_BASE
+/*
+ * Warning, horror ahead.
+ *
+ * The target code lives in our "secure ram", but u-boot doesn't know
+ * that, and has blindly added reloc_off to every relocation
+ * entry. Gahh. Do the opposite conversion. This hack also prevents
+ * GCC from generating code veeners, which u-boot doesn't relocate at
+ * all...
+ */
+#define secure_ram_addr(_fn) ({ \
+ DECLARE_GLOBAL_DATA_PTR; \
+ void *__fn = _fn; \
+ typeof(_fn) *__tmp = (__fn - gd->reloc_off); \
+ __tmp; \
+ })
+#else
+#define secure_ram_addr(_fn) (_fn)
+#endif
+
+#endif
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 10634a4..61aa14e 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -20,6 +20,7 @@
#include <libfdt.h>
#include <fdt_support.h>
#include <asm/bootm.h>
+#include <asm/secure.h>
#include <linux/compiler.h>
#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
@@ -184,27 +185,17 @@ static void setup_end_tag(bd_t *bd)
__weak void setup_board_tags(struct tag **in_params) {}
+#ifdef CONFIG_ARM64
static void do_nonsec_virt_switch(void)
{
-#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
- if (armv7_switch_nonsec() == 0)
-#ifdef CONFIG_ARMV7_VIRT
- if (armv7_switch_hyp() == 0)
- debug("entered HYP mode\n");
-#else
- debug("entered non-secure state\n");
-#endif
-#endif
-
-#ifdef CONFIG_ARM64
smp_kick_all_cpus();
flush_dcache_all(); /* flush cache before swtiching to EL2 */
armv8_switch_to_el2();
#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
armv8_switch_to_el1();
#endif
-#endif
}
+#endif
/* Subcommand: PREP */
static void boot_prep_linux(bootm_headers_t *images)
@@ -287,8 +278,13 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
r2 = gd->bd->bi_boot_params;
if (!fake) {
- do_nonsec_virt_switch();
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
+ armv7_init_nonsec();
+ secure_ram_addr(_do_nonsec_entry)(kernel_entry,
+ 0, machid, r2);
+#else
kernel_entry(0, machid, r2);
+#endif
}
#endif
}
From 8ea1554da4a6e556d3213a77cf59daa1c154bdb5 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:13 +0000
Subject: [PATCH] ARM: HYP/non-sec: add generic ARMv7 PSCI code
Implement core support for PSCI. As this is generic code, it doesn't
implement anything really useful (all the functions are returning
Not Implemented).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/cpu/armv7/Makefile | 4 ++
arch/arm/cpu/armv7/psci.S | 105 ++++++++++++++++++++++++++++++++++++++++++++
arch/arm/include/asm/psci.h | 35 +++++++++++++++
3 files changed, 144 insertions(+)
create mode 100644 arch/arm/cpu/armv7/psci.S
create mode 100644 arch/arm/include/asm/psci.h
diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile
index 6f17771..0cf5c45 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -24,6 +24,10 @@ obj-y += nonsec_virt.o
obj-y += virt-v7.o
endif
+ifneq ($(CONFIG_ARMV7_PSCI),)
+obj-y += psci.o
+endif
+
obj-$(CONFIG_KONA) += kona-common/
obj-$(CONFIG_OMAP_COMMON) += omap-common/
obj-$(CONFIG_TEGRA) += tegra-common/
diff --git a/arch/arm/cpu/armv7/psci.S b/arch/arm/cpu/armv7/psci.S
new file mode 100644
index 0000000..a9341e0
--- /dev/null
+++ b/arch/arm/cpu/armv7/psci.S
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2013 - ARM Ltd
+ * Author: 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 <linux/linkage.h>
+#include <asm/psci.h>
+
+ .pushsection ._secure.text, "ax"
+
+ .arch_extension sec
+
+ .align 5
+ .globl _psci_vectors
+_psci_vectors:
+ b default_psci_vector @ reset
+ b default_psci_vector @ undef
+ b _smc_psci @ smc
+ b default_psci_vector @ pabort
+ b default_psci_vector @ dabort
+ b default_psci_vector @ hyp
+ b default_psci_vector @ irq
+ b psci_fiq_enter @ fiq
+
+ENTRY(psci_fiq_enter)
+ movs pc, lr
+ENDPROC(psci_fiq_enter)
+.weak psci_fiq_enter
+
+ENTRY(default_psci_vector)
+ movs pc, lr
+ENDPROC(default_psci_vector)
+.weak default_psci_vector
+
+ENTRY(psci_cpu_suspend)
+ENTRY(psci_cpu_off)
+ENTRY(psci_cpu_on)
+ENTRY(psci_migrate)
+ mov r0, #ARM_PSCI_RET_NI @ Return -1 (Not Implemented)
+ mov pc, lr
+ENDPROC(psci_migrate)
+ENDPROC(psci_cpu_on)
+ENDPROC(psci_cpu_off)
+ENDPROC(psci_cpu_suspend)
+.weak psci_cpu_suspend
+.weak psci_cpu_off
+.weak psci_cpu_on
+.weak psci_migrate
+
+_psci_table:
+ .word ARM_PSCI_FN_CPU_SUSPEND
+ .word psci_cpu_suspend
+ .word ARM_PSCI_FN_CPU_OFF
+ .word psci_cpu_off
+ .word ARM_PSCI_FN_CPU_ON
+ .word psci_cpu_on
+ .word ARM_PSCI_FN_MIGRATE
+ .word psci_migrate
+ .word 0
+ .word 0
+
+_smc_psci:
+ push {r3-r7,lr}
+
+ @ Switch to secure
+ mrc p15, 0, r7, c1, c1, 0
+ bic r4, r7, #1
+ mcr p15, 0, r4, c1, c1, 0
+ isb
+
+ adr r4, _psci_table
+1: ldr r5, [r4] @ Load PSCI function ID
+ ldr r6, [r4, #4] @ Load target PC
+ cmp r5, #0 @ If reach the end, bail out
+ mvneq r0, #0 @ Return -1 (Not Implemented)
+ beq 2f
+ cmp r0, r5 @ If not matching, try next entry
+ addne r4, r4, #8
+ bne 1b
+ cmp r6, #0 @ Not implemented
+ moveq r0, #ARM_PSCI_RET_NI
+ beq 2f
+
+ blx r6 @ Execute PSCI function
+
+ @ Switch back to non-secure
+ mcr p15, 0, r7, c1, c1, 0
+
+2: pop {r3-r7, lr}
+ movs pc, lr @ Return to the kernel
+
+ .popsection
diff --git a/arch/arm/include/asm/psci.h b/arch/arm/include/asm/psci.h
new file mode 100644
index 0000000..704b4b0
--- /dev/null
+++ b/arch/arm/include/asm/psci.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2013 - ARM Ltd
+ * Author: 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/>.
+ */
+
+#ifndef __ARM_PSCI_H__
+#define __ARM_PSCI_H__
+
+/* PSCI interface */
+#define ARM_PSCI_FN_BASE 0x95c1ba5e
+#define ARM_PSCI_FN(n) (ARM_PSCI_FN_BASE + (n))
+
+#define ARM_PSCI_FN_CPU_SUSPEND ARM_PSCI_FN(0)
+#define ARM_PSCI_FN_CPU_OFF ARM_PSCI_FN(1)
+#define ARM_PSCI_FN_CPU_ON ARM_PSCI_FN(2)
+#define ARM_PSCI_FN_MIGRATE ARM_PSCI_FN(3)
+
+#define ARM_PSCI_RET_SUCCESS 0
+#define ARM_PSCI_RET_NI (-1)
+#define ARM_PSCI_RET_INVAL (-2)
+#define ARM_PSCI_RET_DENIED (-3)
+
+#endif /* __ARM_PSCI_H__ */
From 0ca6171c385fed00125b320592ee94922f44f13a Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:14 +0000
Subject: [PATCH] ARM: HYP/non-sec: add the option for a second-stage monitor
Allow the switch to a second stage secure monitor just before
switching to non-secure.
This allows a resident piece of firmware to be active once the
kernel has been entered (the u-boot monitor is dead anyway,
its pages being reused).
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/cpu/armv7/nonsec_virt.S | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/armv7/nonsec_virt.S b/arch/arm/cpu/armv7/nonsec_virt.S
index 2a43e3c..745670e 100644
--- a/arch/arm/cpu/armv7/nonsec_virt.S
+++ b/arch/arm/cpu/armv7/nonsec_virt.S
@@ -44,10 +44,19 @@ _monitor_vectors:
* ip: target PC
*/
_secure_monitor:
+#ifdef CONFIG_ARMV7_PSCI
+ ldr r5, =_psci_vectors @ Switch to the next monitor
+ mcr p15, 0, r5, c12, c0, 1
+ isb
+
+ @ Obtain a secure stack, and configure the PSCI backend
+ bl psci_arch_init
+#endif
+
mrc p15, 0, r5, c1, c1, 0 @ read SCR
- bic r5, r5, #0x4e @ clear IRQ, FIQ, EA, nET bits
+ bic r5, r5, #0x4a @ clear IRQ, EA, nET bits
orr r5, r5, #0x31 @ enable NS, AW, FW bits
-
+ @ FIQ preserved for secure mode
mov r6, #SVC_MODE @ default mode is SVC
is_cpu_virt_capable r4
#ifdef CONFIG_ARMV7_VIRT
From 9aa373162eb2cc0055a6e4ecd46977c911de1124 Mon Sep 17 00:00:00 2001
From: Ma Haijun <mahaijuns@gmail.com>
Date: Sat, 15 Feb 2014 12:51:10 +0000
Subject: [PATCH] ARM: convert arch_fixup_memory_node to a generic FDT fixup
function
Some architecture needs extra device tree setup. Instead of adding
yet another hook, convert arch_fixup_memory_node to be a generic
FDT fixup function.
[maz: collapsed 3 patches into one, rewrote commit message]
Signed-off-by: Ma Haijun <mahaijuns@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/lib/bootm-fdt.c | 2 +-
arch/arm/lib/bootm.c | 2 +-
common/image-fdt.c | 7 +++++--
include/common.h | 6 +++---
4 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/arch/arm/lib/bootm-fdt.c b/arch/arm/lib/bootm-fdt.c
index e40691d..8394e15 100644
--- a/arch/arm/lib/bootm-fdt.c
+++ b/arch/arm/lib/bootm-fdt.c
@@ -20,7 +20,7 @@
DECLARE_GLOBAL_DATA_PTR;
-int arch_fixup_memory_node(void *blob)
+int arch_fixup_fdt(void *blob)
{
bd_t *bd = gd->bd;
int bank;
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index 61aa14e..4cff6b0 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -357,7 +357,7 @@ void boot_prep_vxworks(bootm_headers_t *images)
if (images->ft_addr) {
off = fdt_path_offset(images->ft_addr, "/memory");
if (off < 0) {
- if (arch_fixup_memory_node(images->ft_addr))
+ if (arch_fixup_fdt(images->ft_addr))
puts("## WARNING: fixup memory failed!\n");
}
}
diff --git a/common/image-fdt.c b/common/image-fdt.c
index a54a919..6f074de 100644
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -445,7 +445,7 @@ __weak int ft_verify_fdt(void *fdt)
return 1;
}
-__weak int arch_fixup_memory_node(void *blob)
+__weak int arch_fixup_fdt(void *blob)
{
return 0;
}
@@ -462,7 +462,10 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob,
puts(" - must RESET the board to recover.\n");
return -1;
}
- arch_fixup_memory_node(blob);
+ if (arch_fixup_fdt(blob) < 0) {
+ puts("ERROR: arch specific fdt fixup failed");
+ return -1;
+ }
if (IMAGE_OF_BOARD_SETUP)
ft_board_setup(blob, gd->bd);
fdt_fixup_ethernet(blob);
diff --git a/include/common.h b/include/common.h
index cbd3c9e..700b015 100644
--- a/include/common.h
+++ b/include/common.h
@@ -326,14 +326,14 @@ int arch_early_init_r(void);
void board_show_dram(ulong size);
/**
- * arch_fixup_memory_node() - Write arch-specific memory information to fdt
+ * arch_fixup_fdt() - Write arch-specific information to fdt
*
- * Defined in arch/$(ARCH)/lib/bootm.c
+ * Defined in arch/$(ARCH)/lib/bootm-fdt.c
*
* @blob: FDT blob to write to
* @return 0 if ok, or -ve FDT_ERR_... on failure
*/
-int arch_fixup_memory_node(void *blob);
+int arch_fixup_fdt(void *blob);
/* common/flash.c */
void flash_perror (int);
From ccdf689da800c9f1c5226146e936b071c7ec8800 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:15 +0000
Subject: [PATCH] ARM: HYP/non-sec/PSCI: emit DT nodes
Generate the PSCI node in the device tree.
Also add a reserve section for the "secure" code that lives in
in normal RAM, so that the kernel knows it'd better not trip on
it.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/cpu/armv7/Makefile | 1 +
arch/arm/cpu/armv7/virt-dt.c | 100 +++++++++++++++++++++++++++++++++++++++++++
arch/arm/include/asm/armv7.h | 1 +
arch/arm/lib/bootm-fdt.c | 11 ++++-
4 files changed, 111 insertions(+), 2 deletions(-)
create mode 100644 arch/arm/cpu/armv7/virt-dt.c
diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile
index 0cf5c45..93a5a69 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -22,6 +22,7 @@ endif
ifneq ($(CONFIG_ARMV7_NONSEC)$(CONFIG_ARMV7_VIRT),)
obj-y += nonsec_virt.o
obj-y += virt-v7.o
+obj-y += virt-dt.o
endif
ifneq ($(CONFIG_ARMV7_PSCI),)
diff --git a/arch/arm/cpu/armv7/virt-dt.c b/arch/arm/cpu/armv7/virt-dt.c
new file mode 100644
index 0000000..0b0d6a7
--- /dev/null
+++ b/arch/arm/cpu/armv7/virt-dt.c
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013 - ARM Ltd
+ * Author: 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 <common.h>
+#include <stdio_dev.h>
+#include <linux/ctype.h>
+#include <linux/types.h>
+#include <asm/global_data.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <asm/armv7.h>
+#include <asm/psci.h>
+
+static int fdt_psci(void *fdt)
+{
+#ifdef CONFIG_ARMV7_PSCI
+ int nodeoff;
+ int tmp;
+
+ nodeoff = fdt_path_offset(fdt, "/cpus");
+ if (nodeoff < 0) {
+ printf("couldn't find /cpus\n");
+ return nodeoff;
+ }
+
+ /* add 'enable-method = "psci"' to each cpu node */
+ for (tmp = fdt_first_subnode(fdt, nodeoff);
+ tmp >= 0;
+ tmp = fdt_next_subnode(fdt, tmp)) {
+ const struct fdt_property *prop;
+ int len;
+
+ prop = fdt_get_property(fdt, tmp, "device_type", &len);
+ if (!prop)
+ continue;
+ if (len < 4)
+ continue;
+ if (strcmp(prop->data, "cpu"))
+ continue;
+
+ fdt_setprop_string(fdt, tmp, "enable-method", "psci");
+ }
+
+ nodeoff = fdt_path_offset(fdt, "/psci");
+ if (nodeoff < 0) {
+ nodeoff = fdt_path_offset(fdt, "/");
+ if (nodeoff < 0)
+ return nodeoff;
+
+ nodeoff = fdt_add_subnode(fdt, nodeoff, "psci");
+ if (nodeoff < 0)
+ return nodeoff;
+ }
+
+ tmp = fdt_setprop_string(fdt, nodeoff, "compatible", "arm,psci");
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_string(fdt, nodeoff, "method", "smc");
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_suspend", ARM_PSCI_FN_CPU_SUSPEND);
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_off", ARM_PSCI_FN_CPU_OFF);
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "cpu_on", ARM_PSCI_FN_CPU_ON);
+ if (tmp)
+ return tmp;
+ tmp = fdt_setprop_u32(fdt, nodeoff, "migrate", ARM_PSCI_FN_MIGRATE);
+ if (tmp)
+ return tmp;
+#endif
+ return 0;
+}
+
+int armv7_update_dt(void *fdt)
+{
+#ifndef CONFIG_ARMV7_SECURE_BASE
+ /* secure code lives in RAM, keep it alive */
+ fdt_add_mem_rsv(fdt, (unsigned long)__secure_start,
+ __secure_end - __secure_start);
+#endif
+
+ return fdt_psci(fdt);
+}
diff --git a/arch/arm/include/asm/armv7.h b/arch/arm/include/asm/armv7.h
index 11476dd..323f282 100644
--- a/arch/arm/include/asm/armv7.h
+++ b/arch/arm/include/asm/armv7.h
@@ -79,6 +79,7 @@ void v7_outer_cache_inval_range(u32 start, u32 end);
#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
int armv7_init_nonsec(void);
+int armv7_update_dt(void *fdt);
/* defined in assembly file */
unsigned int _nonsec_init(void);
diff --git a/arch/arm/lib/bootm-fdt.c b/arch/arm/lib/bootm-fdt.c
index 8394e15..ccb76c7 100644
--- a/arch/arm/lib/bootm-fdt.c
+++ b/arch/arm/lib/bootm-fdt.c
@@ -17,13 +17,14 @@
#include <common.h>
#include <fdt_support.h>
+#include <asm/armv7.h>
DECLARE_GLOBAL_DATA_PTR;
int arch_fixup_fdt(void *blob)
{
bd_t *bd = gd->bd;
- int bank;
+ int bank, ret;
u64 start[CONFIG_NR_DRAM_BANKS];
u64 size[CONFIG_NR_DRAM_BANKS];
@@ -32,5 +33,11 @@ int arch_fixup_fdt(void *blob)
size[bank] = bd->bi_dram[bank].size;
}
- return fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
+ ret = fdt_fixup_memory_banks(blob, start, size, CONFIG_NR_DRAM_BANKS);
+ if (ret)
+ return ret;
+
+#if defined(CONFIG_ARMV7_NONSEC) || defined(CONFIG_ARMV7_VIRT)
+ return armv7_update_dt(blob);
+#endif
}
From d5ee64675e6481e4f29e48e494ea132cd74786c8 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:17 +0000
Subject: [PATCH] sunxi: HYP/non-sec: add sun7i PSCI backend
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 | 162 ++++++++++++++++++++++++++++++++++++++
include/configs/sun7i.h | 6 ++
3 files changed, 171 insertions(+)
create mode 100644 arch/arm/cpu/armv7/sunxi/psci.S
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index 19e4b17..0df6772 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -32,6 +32,9 @@ 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..0084c81
--- /dev/null
+++ b/arch/arm/cpu/armv7/sunxi/psci.S
@@ -0,0 +1,162 @@
+/*
+ * 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>
+
+/*
+ * 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_SYS_CLK_FREQ / 1000)
+#define TEN_MS (10 * ONE_MS)
+
+.macro timer_wait reg, ticks
+ @ Program CNTP_TVAL
+ movw \reg, #(\ticks & 0xffff)
+ movt \reg, #(\ticks >> 16)
+ mcr p15, 0, \reg, c14, c2, 0
+ isb
+ @ Enable physical timer, mask interrupt
+ mov \reg, #3
+ mcr p15, 0, \reg, c14, c2, 1
+ @ Poll physical timer until ISTATUS is on
+1: isb
+ mrc p15, 0, \reg, c14, c2, 1
+ ands \reg, \reg, #4
+ bne 1b
+ @ Disable timer
+ mov \reg, #0
+ mcr p15, 0, \reg, c14, c2, 1
+ isb
+.endm
+
+.globl psci_arch_init
+psci_arch_init:
+ mrc p15, 0, r5, c1, c1, 0 @ Read SCR
+ bic r5, r5, #1 @ Secure mode
+ mcr p15, 0, r5, c1, c1, 0 @ Write SCR
+ isb
+
+ mrc p15, 0, r4, c0, c0, 5 @ MPIDR
+ and r4, r4, #3 @ cpu number in cluster
+ mov r5, #400 @ 1kB of stack per CPU
+ mul r4, r4, r5
+
+ adr r5, text_end @ end of text
+ add r5, r5, #0x2000 @ Skip two pages
+ lsr r5, r5, #12 @ Align to start of page
+ lsl r5, r5, #12
+ sub sp, r5, r4 @ here's our stack!
+
+ bx lr
+
+ @ 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
+
+ timer_wait r1, TEN_MS
+
+ @ 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
+ bl psci_arch_init
+
+ adr r0, _target_pc
+ ldr r0, [r0]
+ b _do_nonsec_entry
+
+text_end:
+ .popsection
diff --git a/include/configs/sun7i.h b/include/configs/sun7i.h
index 11cc9ea..bae7b37 100644
--- a/include/configs/sun7i.h
+++ b/include/configs/sun7i.h
@@ -22,6 +22,12 @@
#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
*/
From a74a847c3727209a45c30a80c01b930938941dd4 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <marc.zyngier@arm.com>
Date: Sat, 7 Dec 2013 11:19:18 +0000
Subject: [PATCH] sunxi: HYP/non-sec: configure CNTFRQ on all CPUs
CNTFRQ needs to be properly configured on all CPUs. Otherwise,
virtual machines hoping to find valuable information on secondary
CPUs will be disapointed...
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
include/configs/sun7i.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/configs/sun7i.h b/include/configs/sun7i.h
index bae7b37..58a254b 100644
--- a/include/configs/sun7i.h
+++ b/include/configs/sun7i.h
@@ -27,6 +27,7 @@
#define CONFIG_ARMV7_PSCI 1
#define CONFIG_ARMV7_PSCI_NR_CPUS 2
#define CONFIG_ARMV7_SECURE_BASE SUNXI_SRAM_B_BASE
+#define CONFIG_SYS_CLK_FREQ 24000000
/*
* Include common sunxi configuration where most the settings are