1 /* 2 * Copyright (c) 2011 The Chromium OS Authors. 3 * SPDX-License-Identifier: GPL-2.0+ 4 */ 5 #define DEBUG 6 #include <common.h> 7 #include <dm/root.h> 8 #include <os.h> 9 #include <asm/io.h> 10 #include <asm/state.h> 11 12 DECLARE_GLOBAL_DATA_PTR; 13 14 /* Enable access to PCI memory with map_sysmem() */ 15 static bool enable_pci_map; 16 17 #ifdef CONFIG_PCI 18 /* Last device that was mapped into memory, and length of mapping */ 19 static struct udevice *map_dev; 20 unsigned long map_len; 21 #endif 22 23 void reset_cpu(ulong ignored) 24 { 25 /* Do this here while it still has an effect */ 26 os_fd_restore(); 27 if (state_uninit()) 28 os_exit(2); 29 30 if (dm_uninit()) 31 os_exit(2); 32 33 /* This is considered normal termination for now */ 34 os_exit(0); 35 } 36 37 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 38 { 39 reset_cpu(0); 40 41 return 0; 42 } 43 44 /* delay x useconds */ 45 void __udelay(unsigned long usec) 46 { 47 os_usleep(usec); 48 } 49 50 int cleanup_before_linux(void) 51 { 52 return 0; 53 } 54 55 int cleanup_before_linux_select(int flags) 56 { 57 return 0; 58 } 59 60 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 61 { 62 #ifdef CONFIG_PCI 63 unsigned long plen = len; 64 void *ptr; 65 66 map_dev = NULL; 67 if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) { 68 if (plen != len) { 69 printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n", 70 __func__, paddr, len, plen); 71 } 72 map_len = len; 73 return ptr; 74 } 75 #endif 76 77 return (void *)(gd->arch.ram_buf + paddr); 78 } 79 80 void unmap_physmem(const void *vaddr, unsigned long flags) 81 { 82 #ifdef CONFIG_PCI 83 if (map_dev) { 84 pci_unmap_physmem(vaddr, map_len, map_dev); 85 map_dev = NULL; 86 } 87 #endif 88 } 89 90 void sandbox_set_enable_pci_map(int enable) 91 { 92 enable_pci_map = enable; 93 } 94 95 phys_addr_t map_to_sysmem(const void *ptr) 96 { 97 return (u8 *)ptr - gd->arch.ram_buf; 98 } 99 100 void flush_dcache_range(unsigned long start, unsigned long stop) 101 { 102 } 103 104 int sandbox_read_fdt_from_file(void) 105 { 106 struct sandbox_state *state = state_get_current(); 107 const char *fname = state->fdt_fname; 108 void *blob; 109 loff_t size; 110 int err; 111 int fd; 112 113 blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0); 114 if (!state->fdt_fname) { 115 err = fdt_create_empty_tree(blob, 256); 116 if (!err) 117 goto done; 118 printf("Unable to create empty FDT: %s\n", fdt_strerror(err)); 119 return -EINVAL; 120 } 121 122 err = os_get_filesize(fname, &size); 123 if (err < 0) { 124 printf("Failed to file FDT file '%s'\n", fname); 125 return err; 126 } 127 fd = os_open(fname, OS_O_RDONLY); 128 if (fd < 0) { 129 printf("Failed to open FDT file '%s'\n", fname); 130 return -EACCES; 131 } 132 if (os_read(fd, blob, size) != size) { 133 os_close(fd); 134 return -EIO; 135 } 136 os_close(fd); 137 138 done: 139 gd->fdt_blob = blob; 140 141 return 0; 142 } 143