AArch32: Add support in TF libraries
This patch adds AArch32 support to cpu ops, context management,
per-cpu data and spinlock libraries. The `entrypoint_info`
structure is modified to add support for AArch32 register
arguments. The CPU operations for AEM generic cpu in AArch32
mode is also added.
Change-Id: I1e52e79f498661d8f31f1e7b3a29e222bc7a4483
diff --git a/include/lib/cpus/aarch32/aem_generic.h b/include/lib/cpus/aarch32/aem_generic.h
new file mode 100644
index 0000000..9b31367
--- /dev/null
+++ b/include/lib/cpus/aarch32/aem_generic.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __AEM_GENERIC_H__
+#define __AEM_GENERIC_H__
+
+/* BASE AEM midr for revision 0 */
+#define BASE_AEM_MIDR 0x410FD0F0
+
+#endif /* __AEM_GENERIC_H__ */
diff --git a/include/lib/cpus/aarch32/cpu_macros.S b/include/lib/cpus/aarch32/cpu_macros.S
new file mode 100644
index 0000000..f58f3e9
--- /dev/null
+++ b/include/lib/cpus/aarch32/cpu_macros.S
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef __CPU_MACROS_S__
+#define __CPU_MACROS_S__
+
+#include <arch.h>
+
+#define CPU_IMPL_PN_MASK (MIDR_IMPL_MASK << MIDR_IMPL_SHIFT) | \
+ (MIDR_PN_MASK << MIDR_PN_SHIFT)
+
+ /*
+ * Define the offsets to the fields in cpu_ops structure.
+ */
+ .struct 0
+CPU_MIDR: /* cpu_ops midr */
+ .space 4
+/* Reset fn is needed during reset */
+CPU_RESET_FUNC: /* cpu_ops reset_func */
+ .space 4
+CPU_PWR_DWN_CORE: /* cpu_ops core_pwr_dwn */
+ .space 4
+CPU_PWR_DWN_CLUSTER: /* cpu_ops cluster_pwr_dwn */
+ .space 4
+CPU_OPS_SIZE = .
+
+ /*
+ * Convenience macro to declare cpu_ops structure.
+ * Make sure the structure fields are as per the offsets
+ * defined above.
+ */
+ .macro declare_cpu_ops _name:req, _midr:req, _noresetfunc = 0
+ .section cpu_ops, "a"
+ .align 2
+ .type cpu_ops_\_name, %object
+ .word \_midr
+ .if \_noresetfunc
+ .word 0
+ .else
+ .word \_name\()_reset_func
+ .endif
+ .word \_name\()_core_pwr_dwn
+ .word \_name\()_cluster_pwr_dwn
+ .endm
+
+#endif /* __CPU_MACROS_S__ */
diff --git a/include/lib/el3_runtime/aarch32/context.h b/include/lib/el3_runtime/aarch32/context.h
new file mode 100644
index 0000000..5108141
--- /dev/null
+++ b/include/lib/el3_runtime/aarch32/context.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __CONTEXT_H__
+#define __CONTEXT_H__
+
+/*******************************************************************************
+ * Constants that allow assembler code to access members of and the 'regs'
+ * structure at their correct offsets.
+ ******************************************************************************/
+#define CTX_REGS_OFFSET 0x0
+#define CTX_GPREG_R0 0x0
+#define CTX_GPREG_R1 0x4
+#define CTX_GPREG_R2 0x8
+#define CTX_GPREG_R3 0xC
+#define CTX_LR 0x10
+#define CTX_SCR 0x14
+#define CTX_SPSR 0x18
+#define CTX_NS_SCTLR 0x1C
+#define CTX_REGS_END 0x20
+
+#ifndef __ASSEMBLY__
+
+#include <cassert.h>
+#include <stdint.h>
+
+/*
+ * Common constants to help define the 'cpu_context' structure and its
+ * members below.
+ */
+#define WORD_SHIFT 2
+#define DEFINE_REG_STRUCT(name, num_regs) \
+ typedef struct name { \
+ uint32_t _regs[num_regs]; \
+ } __aligned(8) name##_t
+
+/* Constants to determine the size of individual context structures */
+#define CTX_REG_ALL (CTX_REGS_END >> WORD_SHIFT)
+
+DEFINE_REG_STRUCT(regs, CTX_REG_ALL);
+
+#undef CTX_REG_ALL
+
+#define read_ctx_reg(ctx, offset) ((ctx)->_regs[offset >> WORD_SHIFT])
+#define write_ctx_reg(ctx, offset, val) (((ctx)->_regs[offset >> WORD_SHIFT]) \
+ = val)
+typedef struct cpu_context {
+ regs_t regs_ctx;
+} cpu_context_t;
+
+/* Macros to access members of the 'cpu_context_t' structure */
+#define get_regs_ctx(h) (&((cpu_context_t *) h)->regs_ctx)
+
+/*
+ * Compile time assertions related to the 'cpu_context' structure to
+ * ensure that the assembler and the compiler view of the offsets of
+ * the structure members is the same.
+ */
+CASSERT(CTX_REGS_OFFSET == __builtin_offsetof(cpu_context_t, regs_ctx), \
+ assert_core_context_regs_offset_mismatch);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __CONTEXT_H__ */
diff --git a/include/lib/el3_runtime/context_mgmt.h b/include/lib/el3_runtime/context_mgmt.h
index 672ea11..b264fc3 100644
--- a/include/lib/el3_runtime/context_mgmt.h
+++ b/include/lib/el3_runtime/context_mgmt.h
@@ -42,11 +42,6 @@
* Function & variable prototypes
******************************************************************************/
void cm_init(void);
-void *cm_get_context_by_mpidr(uint64_t mpidr,
- uint32_t security_state) __deprecated;
-void cm_set_context_by_mpidr(uint64_t mpidr,
- void *context,
- uint32_t security_state) __deprecated;
void *cm_get_context_by_index(unsigned int cpu_idx,
unsigned int security_state);
void cm_set_context_by_index(unsigned int cpu_idx,
@@ -54,12 +49,12 @@
unsigned int security_state);
void *cm_get_context(uint32_t security_state);
void cm_set_context(void *context, uint32_t security_state);
-void cm_init_context(uint64_t mpidr,
- const struct entry_point_info *ep) __deprecated;
void cm_init_my_context(const struct entry_point_info *ep);
void cm_init_context_by_index(unsigned int cpu_idx,
const struct entry_point_info *ep);
void cm_prepare_el3_exit(uint32_t security_state);
+
+#ifndef AARCH32
void cm_el1_sysregs_context_save(uint32_t security_state);
void cm_el1_sysregs_context_restore(uint32_t security_state);
void cm_set_elr_el3(uint32_t security_state, uintptr_t entrypoint);
@@ -71,6 +66,16 @@
void cm_set_next_eret_context(uint32_t security_state);
uint32_t cm_get_scr_el3(uint32_t security_state);
+
+void cm_init_context(uint64_t mpidr,
+ const struct entry_point_info *ep) __deprecated;
+
+void *cm_get_context_by_mpidr(uint64_t mpidr,
+ uint32_t security_state) __deprecated;
+void cm_set_context_by_mpidr(uint64_t mpidr,
+ void *context,
+ uint32_t security_state) __deprecated;
+
/* Inline definitions */
/*******************************************************************************
@@ -98,4 +103,5 @@
"msr spsel, #0\n"
: : "r" (context));
}
+#endif /* AARCH32 */
#endif /* __CM_H__ */
diff --git a/include/lib/el3_runtime/cpu_data.h b/include/lib/el3_runtime/cpu_data.h
index 4fc801b..910b153 100644
--- a/include/lib/el3_runtime/cpu_data.h
+++ b/include/lib/el3_runtime/cpu_data.h
@@ -31,16 +31,28 @@
#ifndef __CPU_DATA_H__
#define __CPU_DATA_H__
+#ifdef AARCH32
+
+#if CRASH_REPORTING
+#error "Crash reporting is not supported in AArch32"
+#endif
+#define CPU_DATA_CPU_OPS_PTR 0x0
+
+#else /* AARCH32 */
+
/* Offsets for the cpu_data structure */
#define CPU_DATA_CRASH_BUF_OFFSET 0x18
+/* need enough space in crash buffer to save 8 registers */
+#define CPU_DATA_CRASH_BUF_SIZE 64
+#define CPU_DATA_CPU_OPS_PTR 0x10
+
+#endif /* AARCH32 */
+
#if CRASH_REPORTING
#define CPU_DATA_LOG2SIZE 7
#else
#define CPU_DATA_LOG2SIZE 6
#endif
-/* need enough space in crash buffer to save 8 registers */
-#define CPU_DATA_CRASH_BUF_SIZE 64
-#define CPU_DATA_CPU_OPS_PTR 0x10
#ifndef __ASSEMBLY__
@@ -77,7 +89,9 @@
* used for this.
******************************************************************************/
typedef struct cpu_data {
+#ifndef AARCH32
void *cpu_context[2];
+#endif
uintptr_t cpu_ops_ptr;
#if CRASH_REPORTING
u_register_t crash_buf[CPU_DATA_CRASH_BUF_SIZE >> 3];
@@ -104,12 +118,15 @@
struct cpu_data *_cpu_data_by_index(uint32_t cpu_index);
+#ifndef AARCH32
/* Return the cpu_data structure for the current CPU. */
static inline struct cpu_data *_cpu_data(void)
{
return (cpu_data_t *)read_tpidr_el3();
}
-
+#else
+struct cpu_data *_cpu_data(void);
+#endif
/**************************************************************************
* APIs for initialising and accessing per-cpu data