From: David Feng <fenghua(a)phytium.com.cn>
This patch add gicv3 support to uboot armv8 platform.
Changes for v2:
- rename arm/cpu/armv8/gic.S with arm/lib/gic_64.S
- move smp_kick_all_cpus() from gic.S to start.S, it would be
implementation dependent.
- Each core initialize it's own ReDistributor instead of master
initializeing all ReDistributors. This is advised by arnab.basu
<arnab.basu(a)freescale.com>.
Signed-off-by: David Feng <fenghua(a)phytium.com.cn>
---
arch/arm/cpu/armv8/Makefile | 1 -
arch/arm/cpu/armv8/gic.S | 106 --------------------
arch/arm/cpu/armv8/start.S | 46 +++++++--
arch/arm/include/asm/gic.h | 56 +++++++++++
arch/arm/lib/Makefile | 1 +
arch/arm/lib/gic_64.S | 194 +++++++++++++++++++++++++++++++++++++
include/configs/vexpress_aemv8a.h | 7 ++
7 files changed, 297 insertions(+), 114 deletions(-)
delete mode 100644 arch/arm/cpu/armv8/gic.S
create mode 100644 arch/arm/lib/gic_64.S
diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile
index b6eb6de..7d93f59 100644
--- a/arch/arm/cpu/armv8/Makefile
+++ b/arch/arm/cpu/armv8/Makefile
@@ -13,5 +13,4 @@ obj-y += cache_v8.o
obj-y += exceptions.o
obj-y += cache.o
obj-y += tlb.o
-obj-y += gic.o
obj-y += transition.o
diff --git a/arch/arm/cpu/armv8/gic.S b/arch/arm/cpu/armv8/gic.S
deleted file mode 100644
index 599aa8f..0000000
--- a/arch/arm/cpu/armv8/gic.S
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * GIC Initialization Routines.
- *
- * (C) Copyright 2013
- * David Feng <fenghua(a)phytium.com.cn>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <asm-offsets.h>
-#include <config.h>
-#include <linux/linkage.h>
-#include <asm/macro.h>
-#include <asm/gic.h>
-
-
-/*************************************************************************
- *
- * void gic_init(void) __attribute__((weak));
- *
- * Currently, this routine only initialize secure copy of GIC
- * with Security Extensions at EL3.
- *
- *************************************************************************/
-WEAK(gic_init)
- branch_if_slave x0, 2f
-
- /* Initialize Distributor and SPIs */
- ldr x1, =GICD_BASE
- mov w0, #0x3 /* EnableGrp0 | EnableGrp1 */
- str w0, [x1, GICD_CTLR] /* Secure GICD_CTLR */
- ldr w0, [x1, GICD_TYPER]
- and w2, w0, #0x1f /* ITLinesNumber */
- cbz w2, 2f /* No SPIs */
- add x1, x1, (GICD_IGROUPRn + 4)
- mov w0, #~0 /* Config SPIs as Grp1 */
-1: str w0, [x1], #0x4
- sub w2, w2, #0x1
- cbnz w2, 1b
-
- /* Initialize SGIs and PPIs */
-2: ldr x1, =GICD_BASE
- mov w0, #~0 /* Config SGIs and PPIs as Grp1 */
- str w0, [x1, GICD_IGROUPRn] /* GICD_IGROUPR0 */
- mov w0, #0x1 /* Enable SGI 0 */
- str w0, [x1, GICD_ISENABLERn]
-
- /* Initialize Cpu Interface */
- ldr x1, =GICC_BASE
- mov w0, #0x1e7 /* Disable IRQ/FIQ Bypass & */
- /* Enable Ack Group1 Interrupt & */
- /* EnableGrp0 & EnableGrp1 */
- str w0, [x1, GICC_CTLR] /* Secure GICC_CTLR */
-
- mov w0, #0x1 << 7 /* Non-Secure access to GICC_PMR */
- str w0, [x1, GICC_PMR]
-
- ret
-ENDPROC(gic_init)
-
-
-/*************************************************************************
- *
- * void gic_send_sgi(u64 sgi) __attribute__((weak));
- *
- *************************************************************************/
-WEAK(gic_send_sgi)
- ldr x1, =GICD_BASE
- mov w2, #0x8000
- movk w2, #0x100, lsl #16
- orr w2, w2, w0
- str w2, [x1, GICD_SGIR]
- ret
-ENDPROC(gic_send_sgi)
-
-
-/*************************************************************************
- *
- * void wait_for_wakeup(void) __attribute__((weak));
- *
- * Wait for SGI 0 from master.
- *
- *************************************************************************/
-WEAK(wait_for_wakeup)
- ldr x1, =GICC_BASE
-0: wfi
- ldr w0, [x1, GICC_AIAR]
- str w0, [x1, GICC_AEOIR]
- cbnz w0, 0b
- ret
-ENDPROC(wait_for_wakeup)
-
-
-/*************************************************************************
- *
- * void smp_kick_all_cpus(void) __attribute__((weak));
- *
- *************************************************************************/
-WEAK(smp_kick_all_cpus)
- /* Kick secondary cpus up by SGI 0 interrupt */
- mov x0, xzr /* SGI 0 */
- mov x29, lr /* Save LR */
- bl gic_send_sgi
- mov lr, x29 /* Restore LR */
- ret
-ENDPROC(smp_kick_all_cpus)
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S
index bcc2603..4d304cf 100644
--- a/arch/arm/cpu/armv8/start.S
+++ b/arch/arm/cpu/armv8/start.S
@@ -50,7 +50,10 @@ reset:
*/
adr x0, vectors
switch_el x1, 3f, 2f, 1f
-3: msr vbar_el3, x0
+3: mrs x0, scr_el3
+ orr x0, x0, #0xf /* SCR_EL3.NS|IRQ|FIQ|EA */
+ msr scr_el3, x0
+ msr vbar_el3, x0
msr cptr_el3, xzr /* Enable FP/SIMD */
ldr x0, =COUNTER_FREQUENCY
msr cntfrq_el0, x0 /* Initialize CNTFRQ */
@@ -93,32 +96,61 @@ master_cpu:
/*-----------------------------------------------------------------------*/
WEAK(lowlevel_init)
- /* Initialize GIC Secure Bank Status */
mov x29, lr /* Save LR */
- bl gic_init
- branch_if_master x0, x1, 1f
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+ branch_if_slave x0, 1f
+ ldr x0, =GICD_BASE
+ bl gic_init_secure
+1:
+#if defined(CONFIG_GICV3)
+ ldr x0, =GICR_BASE
+ bl gic_init_secure_percpu
+#elif defined(CONFIG_GICV2)
+ ldr x0, =GICD_BASE
+ ldr x1, =GICC_BASE
+ bl gic_init_secure_percpu
+#endif
+#endif
+
+ branch_if_master x0, x1, 2f
/*
* Slave should wait for master clearing spin table.
* This sync prevent salves observing incorrect
* value of spin table and jumping to wrong place.
*/
- bl wait_for_wakeup
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+#ifdef CONFIG_GICV2
+ ldr x0, =GICC_BASE
+#endif
+ bl gic_wait_for_interrupt
+#endif
/*
- * All processors will enter EL2 and optionally EL1.
+ * All slaves will enter EL2 and optionally EL1.
*/
bl armv8_switch_to_el2
#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
bl armv8_switch_to_el1
#endif
-1:
+2:
mov lr, x29 /* Restore LR */
ret
ENDPROC(lowlevel_init)
+WEAK(smp_kick_all_cpus)
+ /* Kick secondary cpus up by SGI 0 interrupt */
+ mov x29, lr /* Save LR */
+#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
+ ldr x0, =GICD_BASE
+ bl gic_kick_secondary_cpus
+#endif
+ mov lr, x29 /* Restore LR */
+ ret
+ENDPROC(smp_kick_all_cpus)
+
/*-----------------------------------------------------------------------*/
ENTRY(c_runtime_cpu_setup)
diff --git a/arch/arm/include/asm/gic.h b/arch/arm/include/asm/gic.h
index ac2b2bf..bd3a80c 100644
--- a/arch/arm/include/asm/gic.h
+++ b/arch/arm/include/asm/gic.h
@@ -51,4 +51,60 @@
#define GICC_IIDR 0x00fc
#define GICC_DIR 0x1000
+/* ReDistributor Registers for Control and Physical LPIs */
+#define GICR_CTLR 0x0000
+#define GICR_IIDR 0x0004
+#define GICR_TYPER 0x0008
+#define GICR_STATUSR 0x0010
+#define GICR_WAKER 0x0014
+#define GICR_SETLPIR 0x0040
+#define GICR_CLRLPIR 0x0048
+#define GICR_SEIR 0x0068
+#define GICR_PROPBASER 0x0070
+#define GICR_PENDBASER 0x0078
+#define GICR_INVLPIR 0x00a0
+#define GICR_INVALLR 0x00b0
+#define GICR_SYNCR 0x00c0
+#define GICR_MOVLPIR 0x0100
+#define GICR_MOVALLR 0x0110
+
+/* ReDistributor Registers for SGIs and PPIs */
+#define GICR_IGROUPRn 0x0080
+#define GICR_ISENABLERn 0x0100
+#define GICR_ICENABLERn 0x0180
+#define GICR_ISPENDRn 0x0200
+#define GICR_ICPENDRn 0x0280
+#define GICR_ISACTIVERn 0x0300
+#define GICR_ICACTIVERn 0x0380
+#define GICR_IPRIORITYRn 0x0400
+#define GICR_ICFGR0 0x0c00
+#define GICR_ICFGR1 0x0c04
+#define GICR_IGROUPMODRn 0x0d00
+#define GICR_NSACRn 0x0e00
+
+/* Cpu Interface System Registers */
+#define ICC_IAR0_EL1 S3_0_C12_C8_0
+#define ICC_IAR1_EL1 S3_0_C12_C12_0
+#define ICC_EOIR0_EL1 S3_0_C12_C8_1
+#define ICC_EOIR1_EL1 S3_0_C12_C12_1
+#define ICC_HPPIR0_EL1 S3_0_C12_C8_2
+#define ICC_HPPIR1_EL1 S3_0_C12_C12_2
+#define ICC_BPR0_EL1 S3_0_C12_C8_3
+#define ICC_BPR1_EL1 S3_0_C12_C12_3
+#define ICC_DIR_EL1 S3_0_C12_C11_1
+#define ICC_PMR_EL1 S3_0_C4_C6_0
+#define ICC_RPR_EL1 S3_0_C12_C11_3
+#define ICC_CTLR_EL1 S3_0_C12_C12_4
+#define ICC_CTLR_EL3 S3_6_C12_C12_4
+#define ICC_SRE_EL1 S3_0_C12_C12_5
+#define ICC_SRE_EL2 S3_4_C12_C9_5
+#define ICC_SRE_EL3 S3_6_C12_C12_5
+#define ICC_IGRPEN0_EL1 S3_0_C12_C12_6
+#define ICC_IGRPEN1_EL1 S3_0_C12_C12_7
+#define ICC_IGRPEN1_EL3 S3_6_C12_C12_7
+#define ICC_SEIEN_EL1 S3_0_C12_C13_0
+#define ICC_SGI0R_EL1 S3_0_C12_C11_7
+#define ICC_SGI1R_EL1 S3_0_C12_C11_5
+#define ICC_ASGI1R_EL1 S3_0_C12_C11_6
+
#endif /* __GIC_H__ */
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 9fc81cd..e035d6a 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -35,6 +35,7 @@ endif
obj-y += sections.o
ifdef CONFIG_ARM64
+obj-y += gic_64.o
obj-y += interrupts_64.o
else
obj-y += interrupts.o
diff --git a/arch/arm/lib/gic_64.S b/arch/arm/lib/gic_64.S
new file mode 100644
index 0000000..d56396e
--- /dev/null
+++ b/arch/arm/lib/gic_64.S
@@ -0,0 +1,194 @@
+/*
+ * GIC Initialization Routines.
+ *
+ * (C) Copyright 2013
+ * David Feng <fenghua(a)phytium.com.cn>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <asm-offsets.h>
+#include <config.h>
+#include <linux/linkage.h>
+#include <asm/macro.h>
+#include <asm/gic.h>
+
+
+/*************************************************************************
+ *
+ * void gic_init_secure(DistributorBase);
+ *
+ * Initialize secure copy of GIC at EL3.
+ *
+ *************************************************************************/
+ENTRY(gic_init_secure)
+ /*
+ * Initialize Distributor
+ * x0: Distributor Base
+ */
+#if defined(CONFIG_GICV3)
+ mov w9, #0x37 /* EnableGrp0 | EnableGrp1NS */
+ /* EnableGrp1S | ARE_S | ARE_NS */
+ str w9, [x0, GICD_CTLR] /* Secure GICD_CTLR */
+ ldr w9, [x0, GICD_TYPER]
+ and w10, w9, #0x1f /* ITLinesNumber */
+ cbz w10, 1f /* No SPIs */
+ add x11, x0, (GICD_IGROUPRn + 4)
+ add x12, x0, (GICD_IGROUPMODRn + 4)
+ mov w9, #~0
+0: str w9, [x11], #0x4
+ str wzr, [x12], #0x4 /* Config SPIs as Group1NS */
+ sub w10, w10, #0x1
+ cbnz w10, 0b
+#elif defined(CONFIG_GICV2)
+ mov w9, #0x3 /* EnableGrp0 | EnableGrp1 */
+ str w9, [x0, GICD_CTLR] /* Secure GICD_CTLR */
+ ldr w9, [x0, GICD_TYPER]
+ and w10, w9, #0x1f /* ITLinesNumber */
+ cbz w10, 1f /* No SPIs */
+ add x11, x0, (GICD_IGROUPRn + 4)
+ mov w9, #~0 /* Config SPIs as Grp1 */
+0: str w9, [x11], #0x4
+ sub w10, w10, #0x1
+ cbnz w10, 0b
+#endif
+1:
+ ret
+ENDPROC(gic_init_secure)
+
+
+/*************************************************************************
+ * For Gicv2:
+ * void gic_init_secure_percpu(DistributorBase, CpuInterfaceBase);
+ * For Gicv3:
+ * void gic_init_secure_percpu(ReDistributorBase);
+ *
+ * Initialize secure copy of GIC at EL3.
+ *
+ *************************************************************************/
+ENTRY(gic_init_secure_percpu)
+#if defined(CONFIG_GICV3)
+ /*
+ * Initialize ReDistributor
+ * x0: ReDistributor Base
+ */
+ mrs x10, mpidr_el1
+ lsr x9, x10, #32
+ bfi x10, x9, #24, #8 /* w10 is aff3:aff2:aff1:aff0 */
+ mov x9, x0
+1: ldr x11, [x9, GICR_TYPER]
+ lsr x11, x11, #32 /* w11 is aff3:aff2:aff1:aff0 */
+ cmp w10, w11
+ b.eq 2f
+ add x9, x9, #(2 << 16)
+ b 1b
+
+ /* x9: ReDistributor Base Address of Current CPU */
+2: mov w10, #~0x2
+ ldr w11, [x9, GICR_WAKER]
+ and w11, w11, w10 /* Clear ProcessorSleep */
+ str w11, [x9, GICR_WAKER]
+ dsb st
+ isb
+3: ldr w10, [x9, GICR_WAKER]
+ tbnz w10, #2, 3b /* Wait Children be Alive */
+
+ add x10, x9, #(1 << 16) /* SGI_Base */
+ mov w11, #~0
+ str w11, [x10, GICR_IGROUPRn]
+ str wzr, [x10, GICR_IGROUPMODRn] /* SGIs|PPIs Group1NS */
+ mov w11, #0x1 /* Enable SGI 0 */
+ str w11, [x10, GICR_ISENABLERn]
+
+ /* Initialize Cpu Interface */
+ mrs x10, ICC_SRE_EL3
+ orr x10, x10, #0xf /* SRE & Disable IRQ/FIQ Bypass & */
+ /* Allow EL2 access to ICC_SRE_EL2 */
+ msr ICC_SRE_EL3, x10
+ isb
+
+ mrs x10, ICC_SRE_EL2
+ orr x10, x10, #0xf /* SRE & Disable IRQ/FIQ Bypass & */
+ /* Allow EL1 access to ICC_SRE_EL1 */
+ msr ICC_SRE_EL2, x10
+ isb
+
+ mov x10, #0x3 /* EnableGrp1NS | EnableGrp1S */
+ msr ICC_IGRPEN1_EL3, x10
+ isb
+
+ msr ICC_CTLR_EL3, xzr
+ isb
+
+ msr ICC_CTLR_EL1, xzr /* NonSecure ICC_CTLR_EL1 */
+ isb
+
+ mov x10, #0x1 << 7 /* Non-Secure access to ICC_PMR_EL1 */
+ msr ICC_PMR_EL1, x10
+ isb
+#elif defined(CONFIG_GICV2)
+ /*
+ * Initialize SGIs and PPIs
+ * x0: Distributor Base
+ * x1: Cpu Interface Base
+ */
+ mov w9, #~0 /* Config SGIs and PPIs as Grp1 */
+ str w9, [x0, GICD_IGROUPRn] /* GICD_IGROUPR0 */
+ mov w9, #0x1 /* Enable SGI 0 */
+ str w9, [x0, GICD_ISENABLERn]
+
+ /* Initialize Cpu Interface */
+ mov w9, #0x1e7 /* Disable IRQ/FIQ Bypass & */
+ /* Enable Ack Group1 Interrupt & */
+ /* EnableGrp0 & EnableGrp1 */
+ str w9, [x1, GICC_CTLR] /* Secure GICC_CTLR */
+
+ mov w9, #0x1 << 7 /* Non-Secure access to GICC_PMR */
+ str w9, [x1, GICC_PMR]
+#endif
+ ret
+ENDPROC(gic_init_secure_percpu)
+
+
+/*************************************************************************
+ * For Gicv2:
+ * void gic_kick_secondary_cpus(DistributorBase);
+ * For Gicv3:
+ * void gic_kick_secondary_cpus(void);
+ *
+ *************************************************************************/
+ENTRY(gic_kick_secondary_cpus)
+#if defined(CONFIG_GICV3)
+ mov x9, #(1 << 40)
+ msr ICC_ASGI1R_EL1, x9
+ isb
+#elif defined(CONFIG_GICV2)
+ mov w9, #0x8000
+ movk w9, #0x100, lsl #16
+ str w9, [x0, GICD_SGIR]
+#endif
+ ret
+ENDPROC(gic_kick_secondary_cpus)
+
+
+/*************************************************************************
+ * For Gicv2:
+ * void gic_wait_for_interrupt(CpuInterfaceBase);
+ * For Gicv3:
+ * void gic_wait_for_interrupt(void);
+ *
+ * Wait for SGI 0 from master.
+ *
+ *************************************************************************/
+ENTRY(gic_wait_for_interrupt)
+0: wfi
+#if defined(CONFIG_GICV3)
+ mrs x9, ICC_IAR1_EL1
+ msr ICC_EOIR1_EL1, x9
+#elif defined(CONFIG_GICV2)
+ ldr w9, [x0, GICC_AIAR]
+ str w9, [x0, GICC_AEOIR]
+#endif
+ cbnz w9, 0b
+ ret
+ENDPROC(gic_wait_for_interrupt)
diff --git a/include/configs/vexpress_aemv8a.h b/include/configs/vexpress_aemv8a.h
index e851702..dff6adc 100644
--- a/include/configs/vexpress_aemv8a.h
+++ b/include/configs/vexpress_aemv8a.h
@@ -12,6 +12,8 @@
#define CONFIG_REMAKE_ELF
+#define CONFIG_GICV3
+
/*#define CONFIG_ARMV8_SWITCH_TO_EL1*/
/*#define CONFIG_SYS_GENERIC_BOARD*/
@@ -93,8 +95,13 @@
#define COUNTER_FREQUENCY (0x1800000) /* 24MHz */
/* Generic Interrupt Controller Definitions */
+#ifdef CONFIG_GICV3
+#define GICD_BASE (0x2f000000)
+#define GICR_BASE (0x2f100000)
+#else
#define GICD_BASE (0x2C001000)
#define GICC_BASE (0x2C002000)
+#endif
#define CONFIG_SYS_MEMTEST_START V2M_BASE
#define CONFIG_SYS_MEMTEST_END (V2M_BASE + 0x80000000)
--
1.7.9.5
