armv8-r: add Bound Multi-Processing (BMP) support

Signed-off-by: chao an <[email protected]>

arch/arm/src/armv8-r/CMakeLists.txt

@@ -47,6 +47,10 @@ list(
   arm_perf.c
   cp15_cacheops.c)
 
+if(CONFIG_SMP OR CONFIG_BMP)
+  list(APPEND SRCS arm_cpuhead.S arm_cpuindex.c arm_cpuidlestack.c)
+endif()
+
 if(CONFIG_ARCH_FPU)
   list(APPEND SRCS arm_fpucmp.c arm_fpuconfig.S)
 endif()

arch/arm/src/armv8-r/arm_cpuhead.S

@@ -0,0 +1,312 @@
+/****************************************************************************
+ * arch/arm/src/armv8-r/arm_cpuhead.S
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <arch/irq.h>
+
+#include "arm.h"
+#include "cp15.h"
+#include "cp15_cacheops.h"
+#include "sctlr.h"
+#include "smp.h"
+#include "chip.h"
+#include "arm_internal.h"
+
+#if defined(CONFIG_SMP) || defined(CONFIG_BMP)
+
+	.file	"arm_cpuhead.S"
+
+/****************************************************************************
+ * Global Symbols
+ ****************************************************************************/
+
+/* Imported symbols */
+
+	.global _hyp_vector_start
+	.global _sys_vector_start
+
+/****************************************************************************
+ * .text
+ ****************************************************************************/
+
+	.text
+	.syntax	unified
+	.arm
+
+/****************************************************************************
+ * Name: __cpu[n]_start
+ *
+ * Description:
+ *   Boot functions for each CPU (other than CPU0).  These functions set up
+ *   the ARM operating mode, the initial stack, and configure co-processor
+ *   registers.  At the end of the boot, arm_cpu_boot() is called.
+ *
+ *   These functions are provided by the common ARMv7-A logic.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   Do not return.
+ *
+ ****************************************************************************/
+
+#if CONFIG_NR_CPUS > 1
+	.global	__cpu1_start
+	.type	__cpu1_start, #function
+
+__cpu1_start:
+	/* Make sure that we are in SYS mode with IRQs and FIQs disabled */
+
+	cpsid		if
+
+	/* Set up the stack pointer and the CPU index */
+
+	ldr		sp, .Lcpu1_stackpointer
+	mov		fp, #0
+
+	/* Then branch to the common startup logic (PC-relative) */
+
+	b		.Lcpu_start
+
+.Lcpu1_stackpointer:
+	.long	.Lcpu1_stacktop
+	.size	__cpu1_start, .-__cpu1_start
+
+#if CONFIG_NR_CPUS > 2
+	.global	__cpu2_start
+	.type	__cpu2_start, #function
+
+__cpu2_start:
+	/* Make sure that we are in SYS mode with IRQs and FIQs disabled */
+
+	cpsid		if
+
+	/* Set up the stack pointer and the CPU index */
+
+	ldr		sp, .Lcpu2_stackpointer
+	mov		fp, #0
+
+	/* Then branch to the common startup logic (PC-relative) */
+
+	b		.Lcpu_start
+
+.Lcpu2_stackpointer:
+	.long	.Lcpu2_stacktop
+	.size	__cpu2_start, .-__cpu2_start
+
+#if CONFIG_NR_CPUS > 3
+	.global	__cpu3_start
+	.type	__cpu3_start, #function
+
+__cpu3_start:
+	/* Make sure that we are in SYS mode with IRQs and FIQs disabled */
+
+	cpsid		if
+
+	/* Set up the stack pointer and the CPU index */
+
+	ldr		sp, .Lcpu3_stackpointer
+	mov		fp, #0
+
+	/* Then branch to the common startup logic (PC-relative) */
+
+	b		.Lcpu_start
+
+.Lcpu3_stackpointer:
+	.long	.Lcpu3_stacktop
+	.size	__cpu3_start, .-__cpu3_start
+
+#if CONFIG_NR_CPUS > 4
+#  error This logic needs to extended for CONFIG_NR_CPUS > 4
+
+#endif /* CONFIG_NR_CPUS > 4 */
+#endif /* CONFIG_NR_CPUS > 3 */
+#endif /* CONFIG_NR_CPUS > 2 */
+#endif /* CONFIG_NR_CPUS > 1 */
+
+/****************************************************************************
+ * Name: .Lcpu_start
+ *
+ * Description:
+ *   Common CPUn startup logic (n > 0)
+ *
+ * On input:
+ *   SP = Set to top of CPU IDLE stack (virtual)
+ *   R5 = CPU number
+ *
+ ****************************************************************************/
+
+	.type	.Lcpu_start, #function
+
+.Lcpu_start:
+
+	/* Set Hyp/PL2 Vector table base register */
+	ldr		r0, .Lhypvectorstart
+	mcr		CP15_HVBAR(r0)
+
+	/* Invalidate caches and TLBs.
+	 *
+	 *   NOTE: "The ARMv7 Virtual Memory System Architecture (VMSA) does not
+	 *   support a CP15 operation to invalidate the entire data cache. ...
+	 *   In normal usage the only time the entire data cache has to be
+	 *   invalidated is on reset."
+	 *
+	 * The instruction cache is virtually indexed and physically tagged but
+	 * the data cache is physically indexed and physically tagged.  So it
+	 * should not be an issue if the system comes up with a dirty Dcache;
+	 * the ICache, however, must be invalidated.
+	 */
+
+	mov		r0, #0
+	mcr		CP15_BPIALL(r0)		/* Invalidate entire branch prediction array */
+	mcr		CP15_ICIALLU(r0)	/* Invalidate I-cache */
+	mov		r1, CP15_CACHE_INVALIDATE
+	bl		cp15_dcache_op_level
+	isb
+
+	bl		hsctlr_initialize  /* Init Hyp system control register */
+
+	ldr		r0, =HACTLR_INIT
+	mcr		CP15_HACTLR(r0)  /* Enable EL1 access all IMP DEFINED registers */
+
+	/* Initialize .bss and .data assumt that RAM that is ready to use. */
+	bl		arm_data_initialize
+
+	/* Platform hook for highest EL */
+	bl		arm_el_init
+
+    /* Move to PL1 SYS with all exceptions masked */
+	mov		r0, #(PSR_MODE_SYS | PSR_I_BIT | PSR_F_BIT | PSR_A_BIT)
+	msr		spsr_hyp, r0
+
+	adr		r0, 1f
+	msr		elr_hyp, r0
+	dsb
+	isb
+	eret
+
+1:
+	mrc		CP15_MPIDR(r0)
+	and		r0, r0, #0x3
+	cmp		r0, #1
+	beq		__cpu1_stack
+	cmp		r0, #2
+	beq		__cpu2_stack
+	cmp		r0, #3
+	beq		__cpu3_stack
+
+__cpu1_stack:
+
+	/* Set up the stack pointer and clear the frame pointer. */
+	ldr		sp, .Lcpu1_stackpointer
+  b 2f
+__cpu2_stack:
+
+	/* Set up the stack pointer and clear the frame pointer. */
+	ldr		sp, .Lcpu2_stackpointer
+  b 2f
+__cpu3_stack:
+
+	/* Set up the stack pointer and clear the frame pointer. */
+	ldr		sp, .Lcpu3_stackpointer
+2:
+	mov		fp, #0
+
+	/* Set PL1 Vector table base register */
+	ldr		r0, .Lsysvectorstart
+	mcr		CP15_VBAR(r0)
+
+	bl		sctlr_initialize
+
+#ifdef CONFIG_ARCH_FPU
+	bl		arm_fpuconfig
+#endif
+
+	bl		arm_boot
+
+	mov		lr, #0				/* LR = return address (none) */
+	b		nx_start			/* Branch to nx_start */
+
+/****************************************************************************
+ * PC_Relative Data
+ ****************************************************************************/
+
+	.size	.Lcpu_start, .-.Lcpu_start
+
+.Lhypvectorstart:
+	.long	_hyp_vector_start
+.Lsysvectorstart:
+	.long	_sys_vector_start
+
+/***************************************************************************
+ * Text-section constants
+ ***************************************************************************/
+
+/***************************************************************************
+ * .noinit section data
+ ***************************************************************************/
+
+	.section	.noinit, "aw"
+
+#if CONFIG_NR_CPUS > 1
+	.align	8
+	.globl	g_cpu1_idlestack
+	.type	g_cpu1_idlestack, object
+
+g_cpu1_idlestack:
+	.space	SMP_STACK_SIZE
+.Lcpu1_stacktop:
+	.size	g_cpu1_idlestack, .Lcpu1_stacktop-g_cpu1_idlestack
+
+#if CONFIG_NR_CPUS > 2
+	.align	8
+	.globl	g_cpu2_idlestack
+	.type	g_cpu2_idlestack, object
+
+g_cpu2_idlestack:
+	.space	SMP_STACK_SIZE
+.Lcpu2_stacktop:
+	.size	g_cpu2_idlestack, .Lcpu2_stacktop-g_cpu2_idlestack
+
+#if CONFIG_NR_CPUS > 3
+	.align	8
+	.globl	g_cpu3_idlestack
+	.type	g_cpu3_idlestack, object
+
+g_cpu3_idlestack:
+	.space	SMP_STACK_SIZE
+.Lcpu3_stacktop:
+	.size	g_cpu3_idlestack, .Lcpu3_stacktop-g_cpu3_idlestack
+
+#if CONFIG_NR_CPUS > 4
+#  error This logic needs to extended for CONFIG_NR_CPUS > 4
+
+#endif /* CONFIG_NR_CPUS > 4 */
+#endif /* CONFIG_NR_CPUS > 3 */
+#endif /* CONFIG_NR_CPUS > 2 */
+#endif /* CONFIG_NR_CPUS > 1 */
+#endif /* CONFIG_SMP */
+	.end