| /* |
| * Copyright (c) 2015, Intel Corporation. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <arch/cpu.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <linker/linker-defs.h> |
| #include <misc/util.h> |
| #include <kernel_internal.h> |
| |
| #define USED_RAM_END_ADDR POINTER_TO_UINT(&_end) |
| |
| #if CONFIG_NEWLIB_LIBC_ALIGNED_HEAP_SIZE |
| /* Compiler will throw an error if the provided value isn't a power of two */ |
| static unsigned char __kernel __aligned(CONFIG_NEWLIB_LIBC_ALIGNED_HEAP_SIZE) |
| heap_base[CONFIG_NEWLIB_LIBC_ALIGNED_HEAP_SIZE]; |
| #define MAX_HEAP_SIZE CONFIG_NEWLIB_LIBC_ALIGNED_HEAP_SIZE |
| #else |
| |
| #if CONFIG_X86 |
| #define USED_RAM_SIZE (USED_RAM_END_ADDR - CONFIG_PHYS_RAM_ADDR) |
| #define MAX_HEAP_SIZE ((KB(CONFIG_RAM_SIZE)) - USED_RAM_SIZE) |
| #elif CONFIG_NIOS2 |
| #include <layout.h> |
| #define USED_RAM_SIZE (USED_RAM_END_ADDR - _RAM_ADDR) |
| #define MAX_HEAP_SIZE (_RAM_SIZE - USED_RAM_SIZE) |
| #elif CONFIG_RISCV32 |
| #include <soc.h> |
| #define USED_RAM_SIZE (USED_RAM_END_ADDR - RISCV_RAM_BASE) |
| #define MAX_HEAP_SIZE (RISCV_RAM_SIZE - USED_RAM_SIZE) |
| #elif CONFIG_ARM |
| #include <soc.h> |
| #define USED_RAM_SIZE (USED_RAM_END_ADDR - CONFIG_SRAM_BASE_ADDRESS) |
| #define MAX_HEAP_SIZE ((KB(CONFIG_SRAM_SIZE)) - USED_RAM_SIZE) |
| #elif CONFIG_XTENSA |
| extern void *_heap_sentry; |
| #define MAX_HEAP_SIZE (POINTER_TO_UINT(&_heap_sentry) - USED_RAM_END_ADDR) |
| #else |
| #define USED_RAM_SIZE (USED_RAM_END_ADDR - CONFIG_SRAM_BASE_ADDRESS) |
| #define MAX_HEAP_SIZE ((KB(CONFIG_SRAM_SIZE)) - USED_RAM_SIZE) |
| #endif |
| |
| static unsigned char *heap_base = UINT_TO_POINTER(USED_RAM_END_ADDR); |
| #endif /* CONFIG_NEWLIB_LIBC_ALIGNED_HEAP_SIZE */ |
| |
| static unsigned int heap_sz; |
| |
| static int _stdout_hook_default(int c) |
| { |
| (void)(c); /* Prevent warning about unused argument */ |
| |
| return EOF; |
| } |
| |
| static int (*_stdout_hook)(int) = _stdout_hook_default; |
| |
| void __stdout_hook_install(int (*hook)(int)) |
| { |
| _stdout_hook = hook; |
| } |
| |
| static unsigned char _stdin_hook_default(void) |
| { |
| return 0; |
| } |
| |
| static unsigned char (*_stdin_hook)(void) = _stdin_hook_default; |
| |
| void __stdin_hook_install(unsigned char (*hook)(void)) |
| { |
| _stdin_hook = hook; |
| } |
| |
| #ifndef CONFIG_POSIX_FS |
| int _read(int fd, char *buf, int nbytes) |
| { |
| int i = 0; |
| |
| for (i = 0; i < nbytes; i++) { |
| *(buf + i) = _stdin_hook(); |
| if ((*(buf + i) == '\n') || (*(buf + i) == '\r')) { |
| i++; |
| break; |
| } |
| } |
| return i; |
| } |
| FUNC_ALIAS(_read, read, int); |
| |
| int _write(int fd, char *buf, int nbytes) |
| { |
| int i; |
| |
| for (i = 0; i < nbytes; i++) { |
| if (*(buf + i) == '\n') { |
| _stdout_hook('\r'); |
| } |
| _stdout_hook(*(buf + i)); |
| } |
| return nbytes; |
| } |
| FUNC_ALIAS(_write, write, int); |
| |
| int _open(const char *name, int mode) |
| { |
| return -1; |
| } |
| FUNC_ALIAS(_open, open, int); |
| |
| int _close(int file) |
| { |
| return -1; |
| } |
| FUNC_ALIAS(_close, close, int); |
| |
| int _lseek(int file, int ptr, int dir) |
| { |
| return 0; |
| } |
| FUNC_ALIAS(_lseek, lseek, int); |
| #else |
| extern ssize_t write(int file, char *buffer, unsigned int count); |
| #define _write write |
| #endif |
| |
| int _isatty(int file) |
| { |
| return 1; |
| } |
| FUNC_ALIAS(_isatty, isatty, int); |
| |
| int _kill(int i, int j) |
| { |
| return 0; |
| } |
| FUNC_ALIAS(_kill, kill, int); |
| |
| int _getpid(void) |
| { |
| return 0; |
| } |
| FUNC_ALIAS(_getpid, getpid, int); |
| |
| int _fstat(int file, struct stat *st) |
| { |
| st->st_mode = S_IFCHR; |
| return 0; |
| } |
| FUNC_ALIAS(_fstat, fstat, int); |
| |
| void _exit(int status) |
| { |
| _write(1, "exit\n", 5); |
| while (1) { |
| ; |
| } |
| } |
| |
| void *_sbrk(int count) |
| { |
| void *ptr = heap_base + heap_sz; |
| |
| if ((heap_sz + count) < MAX_HEAP_SIZE) { |
| heap_sz += count; |
| return ptr; |
| } else { |
| return (void *)-1; |
| } |
| } |
| FUNC_ALIAS(_sbrk, sbrk, void *); |
| |
| void z_newlib_get_heap_bounds(void **base, size_t *size) |
| { |
| *base = heap_base; |
| *size = MAX_HEAP_SIZE; |
| } |