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 if (state_uninit()) 26 os_exit(2); 27 28 if (dm_uninit()) 29 os_exit(2); 30 31 /* This is considered normal termination for now */ 32 os_exit(0); 33 } 34 35 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 36 { 37 reset_cpu(0); 38 39 return 0; 40 } 41 42 /* delay x useconds */ 43 void __udelay(unsigned long usec) 44 { 45 os_usleep(usec); 46 } 47 48 int cleanup_before_linux(void) 49 { 50 return 0; 51 } 52 53 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 54 { 55 #ifdef CONFIG_PCI 56 unsigned long plen = len; 57 void *ptr; 58 59 map_dev = NULL; 60 if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) { 61 if (plen != len) { 62 printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n", 63 __func__, paddr, len, plen); 64 } 65 map_len = len; 66 return ptr; 67 } 68 #endif 69 70 return (void *)(gd->arch.ram_buf + paddr); 71 } 72 73 void unmap_physmem(const void *vaddr, unsigned long flags) 74 { 75 #ifdef CONFIG_PCI 76 if (map_dev) { 77 pci_unmap_physmem(vaddr, map_len, map_dev); 78 map_dev = NULL; 79 } 80 #endif 81 } 82 83 void sandbox_set_enable_pci_map(int enable) 84 { 85 enable_pci_map = enable; 86 } 87 88 phys_addr_t map_to_sysmem(const void *ptr) 89 { 90 return (u8 *)ptr - gd->arch.ram_buf; 91 } 92 93 void flush_dcache_range(unsigned long start, unsigned long stop) 94 { 95 } 96 97 int sandbox_read_fdt_from_file(void) 98 { 99 struct sandbox_state *state = state_get_current(); 100 const char *fname = state->fdt_fname; 101 void *blob; 102 loff_t size; 103 int err; 104 int fd; 105 106 blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0); 107 if (!state->fdt_fname) { 108 err = fdt_create_empty_tree(blob, 256); 109 if (!err) 110 goto done; 111 printf("Unable to create empty FDT: %s\n", fdt_strerror(err)); 112 return -EINVAL; 113 } 114 115 err = os_get_filesize(fname, &size); 116 if (err < 0) { 117 printf("Failed to file FDT file '%s'\n", fname); 118 return err; 119 } 120 fd = os_open(fname, OS_O_RDONLY); 121 if (fd < 0) { 122 printf("Failed to open FDT file '%s'\n", fname); 123 return -EACCES; 124 } 125 if (os_read(fd, blob, size) != size) { 126 os_close(fd); 127 return -EIO; 128 } 129 os_close(fd); 130 131 done: 132 gd->fdt_blob = blob; 133 134 return 0; 135 } 136