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/state.h> 10 11 DECLARE_GLOBAL_DATA_PTR; 12 13 /* Enable access to PCI memory with map_sysmem() */ 14 static bool enable_pci_map; 15 16 #ifdef CONFIG_PCI 17 /* Last device that was mapped into memory, and length of mapping */ 18 static struct udevice *map_dev; 19 unsigned long map_len; 20 #endif 21 22 void reset_cpu(ulong ignored) 23 { 24 if (state_uninit()) 25 os_exit(2); 26 27 if (dm_uninit()) 28 os_exit(2); 29 30 /* This is considered normal termination for now */ 31 os_exit(0); 32 } 33 34 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 35 { 36 reset_cpu(0); 37 38 return 0; 39 } 40 41 /* delay x useconds */ 42 void __udelay(unsigned long usec) 43 { 44 os_usleep(usec); 45 } 46 47 unsigned long __attribute__((no_instrument_function)) timer_get_us(void) 48 { 49 return os_get_nsec() / 1000; 50 } 51 52 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) 53 { 54 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { 55 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 56 printf("## Transferring control to Linux (at address %08lx)...\n", 57 images->ep); 58 reset_cpu(0); 59 } 60 61 return 0; 62 } 63 64 int cleanup_before_linux(void) 65 { 66 return 0; 67 } 68 69 void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 70 { 71 #ifdef CONFIG_PCI 72 unsigned long plen = len; 73 void *ptr; 74 75 map_dev = NULL; 76 if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) { 77 if (plen != len) { 78 printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n", 79 __func__, paddr, len, plen); 80 } 81 map_len = len; 82 return ptr; 83 } 84 #endif 85 86 return (void *)(gd->arch.ram_buf + paddr); 87 } 88 89 void unmap_physmem(const void *vaddr, unsigned long flags) 90 { 91 #ifdef CONFIG_PCI 92 if (map_dev) { 93 pci_unmap_physmem(vaddr, map_len, map_dev); 94 map_dev = NULL; 95 } 96 #endif 97 } 98 99 void sandbox_set_enable_pci_map(int enable) 100 { 101 enable_pci_map = enable; 102 } 103 104 phys_addr_t map_to_sysmem(const void *ptr) 105 { 106 return (u8 *)ptr - gd->arch.ram_buf; 107 } 108 109 void flush_dcache_range(unsigned long start, unsigned long stop) 110 { 111 } 112