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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
This commit is contained in:
Soby Mathew 2016-05-05 14:10:46 +01:00
parent 66be868e9a
commit e33b78a658
11 changed files with 847 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
include/common/bl_common.h
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@ -50,7 +50,11 @@
* 'entry_point_info' structure at their correct offsets.
******************************************************************************/
#define ENTRY_POINT_INFO_PC_OFFSET 0x08
#ifdef AARCH32
#define ENTRY_POINT_INFO_ARGS_OFFSET 0x10
#else
#define ENTRY_POINT_INFO_ARGS_OFFSET 0x18
#endif
/* The following are used to set/get image attributes. */
#define PARAM_EP_SECURITY_MASK (0x1)
@ -192,6 +196,13 @@ typedef struct aapcs64_params {
u_register_t arg7;
} aapcs64_params_t;
typedef struct aapcs32_params {
u_register_t arg0;
u_register_t arg1;
u_register_t arg2;
u_register_t arg3;
} aapcs32_params_t;
/***************************************************************************
* This structure provides version information and the size of the
* structure, attributes for the structure it represents
@ -216,7 +227,11 @@ typedef struct entry_point_info {
param_header_t h;
uintptr_t pc;
uint32_t spsr;
#ifdef AARCH32
aapcs32_params_t args;
#else
aapcs64_params_t args;
#endif
} entry_point_info_t;
/*****************************************************************************

37
include/lib/cpus/aarch32/aem_generic.h Normal file
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@ -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__ */

72
include/lib/cpus/aarch32/cpu_macros.S Normal file
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@ -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__ */

91
include/lib/el3_runtime/aarch32/context.h Normal file
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@ -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__ */

20
include/lib/el3_runtime/context_mgmt.h
View File

@ -42,11 +42,6 @@ struct entry_point_info;
* 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 @@ void cm_set_context_by_index(unsigned int cpu_idx,
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_write_scr_el3_bit(uint32_t security_state,
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 @@ static inline void cm_set_next_context(void *context)
"msr spsel, #0\n"
: : "r" (context));
}
#endif /* AARCH32 */
#endif /* __CM_H__ */

25
include/lib/el3_runtime/cpu_data.h
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@ -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 @@ CASSERT(CPU_DATA_CPU_OPS_PTR == __builtin_offsetof
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

68
lib/cpus/aarch32/aem_generic.S Normal file
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@ -0,0 +1,68 @@
/*
* 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.
*/
#include <aem_generic.h>
#include <arch.h>
#include <asm_macros.S>
#include <assert_macros.S>
#include <cpu_macros.S>
func aem_generic_core_pwr_dwn
/* Assert if cache is enabled */
#if ASM_ASSERTION
ldcopr r0, SCTLR
tst r0, #SCTLR_C_BIT
ASM_ASSERT(eq)
#endif
/* ---------------------------------------------
* Flush L1 cache to PoU.
* ---------------------------------------------
*/
mov r0, #DC_OP_CISW
b dcsw_op_louis
endfunc aem_generic_core_pwr_dwn
func aem_generic_cluster_pwr_dwn
/* Assert if cache is enabled */
#if ASM_ASSERTION
ldcopr r0, SCTLR
tst r0, #SCTLR_C_BIT
ASM_ASSERT(eq)
#endif
/* ---------------------------------------------
* Flush L1 and L2 caches to PoC.
* ---------------------------------------------
*/
mov r0, #DC_OP_CISW
b dcsw_op_all
endfunc aem_generic_cluster_pwr_dwn
/* cpu_ops for Base AEM FVP */
declare_cpu_ops aem_generic, BASE_AEM_MIDR, 1

177
lib/cpus/aarch32/cpu_helpers.S Normal file
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@ -0,0 +1,177 @@
/*
* 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.
*/
#include <arch.h>
#include <asm_macros.S>
#include <assert_macros.S>
#include <cpu_data.h>
#include <cpu_macros.S>
/*
* The reset handler common to all platforms. After a matching
* cpu_ops structure entry is found, the correponding reset_handler
* in the cpu_ops is invoked. The reset handler is invoked very early
* in the boot sequence and it is assumed that we can clobber r0 - r10
* without the need to follow AAPCS.
* Clobbers: r0 - r10
*/
.globl reset_handler
func reset_handler
mov r10, lr
/* The plat_reset_handler can clobber r0 - r9 */
bl plat_reset_handler
/* Get the matching cpu_ops pointer (clobbers: r0 - r5) */
bl get_cpu_ops_ptr
#if ASM_ASSERTION
cmp r0, #0
ASM_ASSERT(ne)
#endif
/* Get the cpu_ops reset handler */
ldr r1, [r0, #CPU_RESET_FUNC]
cmp r1, #0
mov lr, r10
bxne r1
bx lr
endfunc reset_handler
/*
* The prepare core power down function for all platforms. After
* the cpu_ops pointer is retrieved from cpu_data, the corresponding
* pwr_dwn_core in the cpu_ops is invoked. Follows AAPCS.
*/
.globl prepare_core_pwr_dwn
func prepare_core_pwr_dwn
push {lr}
bl _cpu_data
pop {lr}
ldr r1, [r0, #CPU_DATA_CPU_OPS_PTR]
#if ASM_ASSERTION
cmp r1, #0
ASM_ASSERT(ne)
#endif
/* Get the cpu_ops core_pwr_dwn handler */
ldr r0, [r1, #CPU_PWR_DWN_CORE]
bx r0
endfunc prepare_core_pwr_dwn
/*
* The prepare cluster power down function for all platforms. After
* the cpu_ops pointer is retrieved from cpu_data, the corresponding
* pwr_dwn_cluster in the cpu_ops is invoked. Follows AAPCS.
*/
.globl prepare_cluster_pwr_dwn
func prepare_cluster_pwr_dwn
push {lr}
bl _cpu_data
pop {lr}
ldr r1, [r0, #CPU_DATA_CPU_OPS_PTR]
#if ASM_ASSERTION
cmp r1, #0
ASM_ASSERT(ne)
#endif
/* Get the cpu_ops cluster_pwr_dwn handler */
ldr r0, [r1, #CPU_PWR_DWN_CLUSTER]
bx r0
endfunc prepare_cluster_pwr_dwn
/*
* Initializes the cpu_ops_ptr if not already initialized
* in cpu_data. This must only be called after the data cache
* is enabled. AAPCS is followed.
*/
.globl init_cpu_ops
func init_cpu_ops
push {r4 - r6, lr}
bl _cpu_data
mov r6, r0
ldr r1, [r0, #CPU_DATA_CPU_OPS_PTR]
cmp r1, #0
bne 1f
bl get_cpu_ops_ptr
#if ASM_ASSERTION
cmp r0, #0
ASM_ASSERT(ne)
#endif
str r0, [r6, #CPU_DATA_CPU_OPS_PTR]!
1:
pop {r4 - r6, pc}
endfunc init_cpu_ops
/*
* The below function returns the cpu_ops structure matching the
* midr of the core. It reads the MIDR and finds the matching
* entry in cpu_ops entries. Only the implementation and part number
* are used to match the entries.
* Return :
* r0 - The matching cpu_ops pointer on Success
* r0 - 0 on failure.
* Clobbers: r0 - r5
*/
.globl get_cpu_ops_ptr
func get_cpu_ops_ptr
/* Get the cpu_ops start and end locations */
ldr r4, =(__CPU_OPS_START__ + CPU_MIDR)
ldr r5, =(__CPU_OPS_END__ + CPU_MIDR)
/* Initialize the return parameter */
mov r0, #0
/* Read the MIDR_EL1 */
ldcopr r2, MIDR
ldr r3, =CPU_IMPL_PN_MASK
/* Retain only the implementation and part number using mask */
and r2, r2, r3
1:
/* Check if we have reached end of list */
cmp r4, r5
bge error_exit
/* load the midr from the cpu_ops */
ldr r1, [r4], #CPU_OPS_SIZE
and r1, r1, r3
/* Check if midr matches to midr of this core */
cmp r1, r2
bne 1b
/* Subtract the increment and offset to get the cpu-ops pointer */
sub r0, r4, #(CPU_OPS_SIZE + CPU_MIDR)
error_exit:
bx lr
endfunc get_cpu_ops_ptr

235
lib/el3_runtime/aarch32/context_mgmt.c Normal file
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@ -0,0 +1,235 @@
/*
* 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.
*/
#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <bl_common.h>
#include <context.h>
#include <context_mgmt.h>
#include <platform.h>
#include <platform_def.h>
#include <smcc_helpers.h>
#include <string.h>
/*******************************************************************************
* Context management library initialisation routine. This library is used by
* runtime services to share pointers to 'cpu_context' structures for the secure
* and non-secure states. Management of the structures and their associated
* memory is not done by the context management library e.g. the PSCI service
* manages the cpu context used for entry from and exit to the non-secure state.
* The Secure payload manages the context(s) corresponding to the secure state.
* It also uses this library to get access to the non-secure
* state cpu context pointers.
******************************************************************************/
void cm_init(void)
{
/*
* The context management library has only global data to initialize, but
* that will be done when the BSS is zeroed out
*/
}
/*******************************************************************************
* The following function initializes the cpu_context 'ctx' for
* first use, and sets the initial entrypoint state as specified by the
* entry_point_info structure.
*
* The security state to initialize is determined by the SECURE attribute
* of the entry_point_info. The function returns a pointer to the initialized
* context and sets this as the next context to return to.
*
* The EE and ST attributes are used to configure the endianness and secure
* timer availability for the new execution context.
*
* To prepare the register state for entry call cm_prepare_el3_exit() and
* el3_exit(). For Secure-EL1 cm_prepare_el3_exit() is equivalent to
* cm_e1_sysreg_context_restore().
******************************************************************************/
static void cm_init_context_common(cpu_context_t *ctx, const entry_point_info_t *ep)
{
unsigned int security_state;
uint32_t scr, sctlr;
regs_t *reg_ctx;
assert(ctx);
security_state = GET_SECURITY_STATE(ep->h.attr);
/* Clear any residual register values from the context */
memset(ctx, 0, sizeof(*ctx));
/*
* Base the context SCR on the current value, adjust for entry point
* specific requirements
*/
scr = read_scr();
scr &= ~(SCR_NS_BIT | SCR_HCE_BIT);
if (security_state != SECURE)
scr |= SCR_NS_BIT;
/*
* Set up SCTLR for the Non Secure context.
* EE bit is taken from the entrypoint attributes
* M, C and I bits must be zero (as required by PSCI specification)
*
* The target exception level is based on the spsr mode requested.
* If execution is requested to hyp mode, HVC is enabled
* via SCR.HCE.
*
* Always compute the SCTLR_EL1 value and save in the cpu_context
* - the HYP registers are set up by cm_preapre_ns_entry() as they
* are not part of the stored cpu_context
*
* TODO: In debug builds the spsr should be validated and checked
* against the CPU support, security state, endianness and pc
*/
if (security_state != SECURE) {
sctlr = EP_GET_EE(ep->h.attr) ? SCTLR_EE_BIT : 0;
sctlr |= SCTLR_RES1;
write_ctx_reg(reg_ctx, CTX_NS_SCTLR, sctlr);
}
if (GET_M32(ep->spsr) == MODE32_hyp)
scr |= SCR_HCE_BIT;
reg_ctx = get_regs_ctx(ctx);
write_ctx_reg(reg_ctx, CTX_SCR, scr);
write_ctx_reg(reg_ctx, CTX_LR, ep->pc);
write_ctx_reg(reg_ctx, CTX_SPSR, ep->spsr);
/*
* Store the r0-r3 value from the entrypoint into the context
* Use memcpy as we are in control of the layout of the structures
*/
memcpy((void *)reg_ctx, (void *)&ep->args, sizeof(aapcs32_params_t));
}
/*******************************************************************************
* The following function initializes the cpu_context for a CPU specified by
* its `cpu_idx` for first use, and sets the initial entrypoint state as
* specified by the entry_point_info structure.
******************************************************************************/
void cm_init_context_by_index(unsigned int cpu_idx,
const entry_point_info_t *ep)
{
cpu_context_t *ctx;
ctx = cm_get_context_by_index(cpu_idx, GET_SECURITY_STATE(ep->h.attr));
cm_init_context_common(ctx, ep);
}
/*******************************************************************************
* The following function initializes the cpu_context for the current CPU
* for first use, and sets the initial entrypoint state as specified by the
* entry_point_info structure.
******************************************************************************/
void cm_init_my_context(const entry_point_info_t *ep)
{
cpu_context_t *ctx;
ctx = cm_get_context(GET_SECURITY_STATE(ep->h.attr));
cm_init_context_common(ctx, ep);
}
/*******************************************************************************
* Prepare the CPU system registers for first entry into secure or normal world
*
* If execution is requested to hyp mode, HSCTLR is initialized
* If execution is requested to non-secure PL1, and the CPU supports
* HYP mode then HYP mode is disabled by configuring all necessary HYP mode
* registers.
******************************************************************************/
void cm_prepare_el3_exit(uint32_t security_state)
{
uint32_t sctlr, scr, hcptr;
cpu_context_t *ctx = cm_get_context(security_state);
assert(ctx);
if (security_state == NON_SECURE) {
scr = read_ctx_reg(get_regs_ctx(ctx), CTX_SCR);
if (scr & SCR_HCE_BIT) {
/* Use SCTLR value to initialize HSCTLR */
sctlr = read_ctx_reg(get_regs_ctx(ctx),
CTX_NS_SCTLR);
sctlr |= HSCTLR_RES1;
/* Temporarily set the NS bit to access HSCTLR */
write_scr(read_scr() | SCR_NS_BIT);
/*
* Make sure the write to SCR is complete so that
* we can access HSCTLR
*/
isb();
write_hsctlr(sctlr);
isb();
write_scr(read_scr() & ~SCR_NS_BIT);
isb();
} else if (read_id_pfr1() &
(ID_PFR1_VIRTEXT_MASK << ID_PFR1_VIRTEXT_SHIFT)) {
/* Set the NS bit to access HCR, HCPTR, CNTHCTL, VPIDR, VMPIDR */
write_scr(read_scr() | SCR_NS_BIT);
isb();
/* PL2 present but unused, need to disable safely */
write_hcr(0);
/* HSCTLR : can be ignored when bypassing */
/* HCPTR : disable all traps TCPAC, TTA, TCP */
hcptr = read_hcptr();
hcptr &= ~(TCPAC_BIT | TTA_BIT | TCP11_BIT | TCP10_BIT);
write_hcptr(hcptr);
/* Enable EL1 access to timer */
write_cnthctl(PL1PCEN_BIT | PL1PCTEN_BIT);
/* Reset CNTVOFF_EL2 */
write64_cntvoff(0);
/* Set VPIDR, VMPIDR to match MIDR, MPIDR */
write_vpidr(read_midr());
write_vmpidr(read_mpidr());
/*
* Reset VTTBR.
* Needed because cache maintenance operations depend on
* the VMID even when non-secure EL1&0 stage 2 address
* translation are disabled.
*/
write64_vttbr(0);
isb();
write_scr(read_scr() & ~SCR_NS_BIT);
isb();
}
}
}

63
lib/el3_runtime/aarch32/cpu_data.S Normal file
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/*
* 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.
*/
#include <asm_macros.S>
#include <cpu_data.h>
.globl _cpu_data
.globl _cpu_data_by_index
/* -----------------------------------------------------------------
* cpu_data_t *_cpu_data(void)
*
* Return the cpu_data structure for the current CPU.
* -----------------------------------------------------------------
*/
func _cpu_data
push {lr}
bl plat_my_core_pos
pop {lr}
b _cpu_data_by_index
endfunc _cpu_data
/* -----------------------------------------------------------------
* cpu_data_t *_cpu_data_by_index(uint32_t cpu_index)
*
* Return the cpu_data structure for the CPU with given linear index
*
* This can be called without a valid stack.
* clobbers: r0, r1
* -----------------------------------------------------------------
*/
func _cpu_data_by_index
ldr r1, =percpu_data
add r0, r1, r0, LSL #CPU_DATA_LOG2SIZE
bx lr
endfunc _cpu_data_by_index

55
lib/locks/exclusive/aarch32/spinlock.S Normal file
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/*
* 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.
*/
#include <asm_macros.S>
.globl spin_lock
.globl spin_unlock
func spin_lock
mov r2, #1
1:
ldrex r1, [r0]
cmp r1, #0
wfene
strexeq r1, r2, [r0]
cmpeq r1, #0
bne 1b
dmb
bx lr
endfunc spin_lock
func spin_unlock
mov r1, #0
stl r1, [r0]
bx lr
endfunc spin_unlock