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zephyr/include/arch/arc/arch.h
Kumar Gala 4b22ba7e4b syscall: Move arch specific syscall code into its own header 
Split out the arch specific syscall code to reduce include pollution
from other arch related headers.  For example on ARM its possible to get
errno.h included via SoC specific headers.  Which created an interesting
compile issue because of the order of syscall & errno/errno syscall
inclusion.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
2018-08-02 22:06:49 -05:00

231 lines
6.8 KiB
C
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/*
* Copyright (c) 2014 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief ARC specific kernel interface header
*
* This header contains the ARC specific kernel interface. It is
* included by the kernel interface architecture-abstraction header
* include/arch/cpu.h)
*/
#ifndef _ARC_ARCH__H_
#define _ARC_ARCH__H_
#include <generated_dts_board.h>
#include <sw_isr_table.h>
#ifdef CONFIG_CPU_ARCV2
#include <arch/arc/v2/exc.h>
#include <arch/arc/v2/irq.h>
#include <arch/arc/v2/ffs.h>
#include <arch/arc/v2/error.h>
#include <arch/arc/v2/misc.h>
#include <arch/arc/v2/aux_regs.h>
#include <arch/arc/v2/arcv2_irq_unit.h>
#include <arch/arc/v2/asm_inline.h>
#include <arch/arc/v2/addr_types.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(CONFIG_MPU_STACK_GUARD) || defined(CONFIG_USERSPACE)
#if defined(CONFIG_ARC_CORE_MPU)
#if CONFIG_ARC_MPU_VER == 2
/*
* The minimum MPU region of MPU v2 is 2048 bytes. The
* start address of MPU region should be aligned to the
* region size
*/
/* The STACK_GUARD_SIZE is the size of stack guard region */
#define STACK_ALIGN 2048
#elif CONFIG_ARC_MPU_VER == 3
#define STACK_ALIGN 32
#else
#error "Unsupported MPU version"
#endif /* CONFIG_ARC_MPU_VER */
#else /* CONFIG_ARC_CORE_MPU */
#error "Requires to enable MPU"
#endif
#else /* CONFIG_MPU_STACK_GUARD || CONFIG_USERSPACE */
#define STACK_ALIGN 4
#endif
#if defined(CONFIG_MPU_STACK_GUARD)
#if CONFIG_ARC_MPU_VER == 2
#define STACK_GUARD_SIZE 2048
#elif CONFIG_ARC_MPU_VER == 3
#define STACK_GUARD_SIZE 32
#endif
#else /* CONFIG_MPU_STACK_GUARD */
#define STACK_GUARD_SIZE 0
#endif /* CONFIG_MPU_STACK_GUARD */
#define STACK_SIZE_ALIGN(x) max(STACK_ALIGN, x)
/**
* @brief Calculate power of two ceiling for a buffer size input
*
*/
#define POW2_CEIL(x) ((1 << (31 - __builtin_clz(x))) < x ? \
1 << (31 - __builtin_clz(x) + 1) : \
1 << (31 - __builtin_clz(x)))
#if defined(CONFIG_USERSPACE)
#if CONFIG_ARC_MPU_VER == 2
#define _ARCH_THREAD_STACK_DEFINE(sym, size) \
struct _k_thread_stack_element __kernel_noinit \
__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
sym[POW2_CEIL(STACK_SIZE_ALIGN(size)) + \
+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]
#define _ARCH_THREAD_STACK_LEN(size) \
(POW2_CEIL(STACK_SIZE_ALIGN(size)) + \
max(POW2_CEIL(STACK_SIZE_ALIGN(size)), \
POW2_CEIL(STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE)))
#define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
struct _k_thread_stack_element __kernel_noinit \
__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
sym[nmemb][_ARCH_THREAD_STACK_LEN(size)]
#define _ARCH_THREAD_STACK_MEMBER(sym, size) \
struct _k_thread_stack_element \
__aligned(POW2_CEIL(STACK_SIZE_ALIGN(size))) \
sym[POW2_CEIL(size) + \
+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]
#elif CONFIG_ARC_MPU_VER == 3
#define _ARCH_THREAD_STACK_DEFINE(sym, size) \
struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
sym[size + \
+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]
#define _ARCH_THREAD_STACK_LEN(size) \
((size) + STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE)
#define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
sym[nmemb][_ARCH_THREAD_STACK_LEN(size)]
#define _ARCH_THREAD_STACK_MEMBER(sym, size) \
struct _k_thread_stack_element __aligned(STACK_ALIGN) \
sym[size + \
+ STACK_GUARD_SIZE + CONFIG_PRIVILEGED_STACK_SIZE]
#endif /* CONFIG_ARC_MPU_VER */
#define _ARCH_THREAD_STACK_SIZEOF(sym) \
(sizeof(sym) - CONFIG_PRIVILEGED_STACK_SIZE - STACK_GUARD_SIZE)
#define _ARCH_THREAD_STACK_BUFFER(sym) \
((char *)(sym))
#else /* CONFIG_USERSPACE */
#define _ARCH_THREAD_STACK_DEFINE(sym, size) \
struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
sym[size + STACK_GUARD_SIZE]
#define _ARCH_THREAD_STACK_LEN(size) ((size) + STACK_GUARD_SIZE)
#define _ARCH_THREAD_STACK_ARRAY_DEFINE(sym, nmemb, size) \
struct _k_thread_stack_element __kernel_noinit __aligned(STACK_ALIGN) \
sym[nmemb][_ARCH_THREAD_STACK_LEN(size)]
#define _ARCH_THREAD_STACK_MEMBER(sym, size) \
struct _k_thread_stack_element __aligned(STACK_ALIGN) \
sym[size + STACK_GUARD_SIZE]
#define _ARCH_THREAD_STACK_SIZEOF(sym) (sizeof(sym) - STACK_GUARD_SIZE)
#define _ARCH_THREAD_STACK_BUFFER(sym) ((char *)(sym + STACK_GUARD_SIZE))
#endif /* CONFIG_USERSPACE */
#ifdef CONFIG_USERSPACE
#ifdef CONFIG_ARC_MPU
#ifndef _ASMLANGUAGE
#include <arch/arc/v2/mpu/arc_mpu.h>
#define K_MEM_PARTITION_P_NA_U_NA AUX_MPU_RDP_N
#define K_MEM_PARTITION_P_RW_U_RW (AUX_MPU_RDP_UW | AUX_MPU_RDP_UR | \
AUX_MPU_RDP_KW | AUX_MPU_RDP_KR)
#define K_MEM_PARTITION_P_RW_U_RO (AUX_MPU_RDP_UR | \
AUX_MPU_RDP_KW | AUX_MPU_RDP_KR)
#define K_MEM_PARTITION_P_RW_U_NA (AUX_MPU_RDP_KW | AUX_MPU_RDP_KR)
#define K_MEM_PARTITION_P_RO_U_RO (AUX_MPU_RDP_UR | AUX_MPU_RDP_KR)
#define K_MEM_PARTITION_P_RO_U_NA (AUX_MPU_RDP_KR)
/* Execution-allowed attributes */
#define K_MEM_PARTITION_P_RWX_U_RWX (AUX_MPU_RDP_UW | AUX_MPU_RDP_UR | \
AUX_MPU_RDP_KW | AUX_MPU_RDP_KR | \
AUX_MPU_RDP_KE | AUX_MPU_RDP_UE)
#define K_MEM_PARTITION_P_RWX_U_RX (AUX_MPU_RDP_UR | \
AUX_MPU_RDP_KW | AUX_MPU_RDP_KR | \
AUX_MPU_RDP_KE | AUX_MPU_RDP_UE)
#define K_MEM_PARTITION_P_RX_U_RX (AUX_MPU_RDP_UR | \
AUX_MPU_RDP_KR | \
AUX_MPU_RDP_KE | AUX_MPU_RDP_UE)
#define K_MEM_PARTITION_IS_WRITABLE(attr) \
({ \
int __is_writable__; \
attr &= (AUX_MPU_RDP_UW | AUX_MPU_RDP_KW); \
switch (attr) { \
case (AUX_MPU_RDP_UW | AUX_MPU_RDP_KW): \
case AUX_MPU_RDP_UW: \
case AUX_MPU_RDP_KW: \
__is_writable__ = 1; \
break; \
default: \
__is_writable__ = 0; \
break; \
} \
__is_writable__; \
})
#define K_MEM_PARTITION_IS_EXECUTABLE(attr) \
((attr) & (AUX_MPU_RDP_KE | AUX_MPU_RDP_UE))
#endif /* _ASMLANGUAGE */
#if CONFIG_ARC_MPU_VER == 2
#define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
BUILD_ASSERT_MSG(!(((size) & ((size) - 1))) && (size) >= STACK_ALIGN \
&& !((u32_t)(start) & ((size) - 1)), \
"the size of the partition must be power of 2" \
" and greater than or equal to the mpu adddress alignment." \
"start address of the partition must align with size.")
#elif CONFIG_ARC_MPU_VER == 3
#define _ARCH_MEM_PARTITION_ALIGN_CHECK(start, size) \
BUILD_ASSERT_MSG((size) % STACK_ALIGN == 0 && (size) >= STACK_ALIGN \
&& (u32_t)(start) % STACK_ALIGN == 0, \
"the size of the partition must align with 32" \
" and greater than or equal to 32." \
"start address of the partition must align with 32.")
#endif
#endif /* CONFIG_ARC_MPU*/
#endif /* CONFIG_USERSPACE */
#ifndef _ASMLANGUAGE
/* Typedef for the k_mem_partition attribute*/
typedef u32_t k_mem_partition_attr_t;
#endif /* _ASMLANGUAGE */
#ifdef __cplusplus
}
#endif
#endif /* _ARC_ARCH__H_ */
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