cpu.c
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/*
* Copyright (c) 2011 The Chromium OS Authors.
* SPDX-License-Identifier: GPL-2.0+
*/
#define DEBUG
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <libfdt.h>
#include <os.h>
#include <asm/io.h>
#include <asm/state.h>
#include <dm/root.h>
DECLARE_GLOBAL_DATA_PTR;
/* Enable access to PCI memory with map_sysmem() */
static bool enable_pci_map;
#ifdef CONFIG_PCI
/* Last device that was mapped into memory, and length of mapping */
static struct udevice *map_dev;
unsigned long map_len;
#endif
void sandbox_exit(void)
{
/* Do this here while it still has an effect */
os_fd_restore();
if (state_uninit())
os_exit(2);
if (dm_uninit())
os_exit(2);
/* This is considered normal termination for now */
os_exit(0);
}
/* delay x useconds */
void __udelay(unsigned long usec)
{
struct sandbox_state *state = state_get_current();
if (!state->skip_delays)
os_usleep(usec);
}
int cleanup_before_linux(void)
{
return 0;
}
int cleanup_before_linux_select(int flags)
{
return 0;
}
void *phys_to_virt(phys_addr_t paddr)
{
return (void *)(gd->arch.ram_buf + paddr);
}
phys_addr_t virt_to_phys(void *vaddr)
{
return (phys_addr_t)((uint8_t *)vaddr - gd->arch.ram_buf);
}
void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
#if defined(CONFIG_PCI) && !defined(CONFIG_SPL_BUILD)
unsigned long plen = len;
void *ptr;
map_dev = NULL;
if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) {
if (plen != len) {
printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n",
__func__, (uint)paddr, len, plen);
}
map_len = len;
return ptr;
}
#endif
return phys_to_virt(paddr);
}
void unmap_physmem(const void *vaddr, unsigned long flags)
{
#ifdef CONFIG_PCI
if (map_dev) {
pci_unmap_physmem(vaddr, map_len, map_dev);
map_dev = NULL;
}
#endif
}
void sandbox_set_enable_pci_map(int enable)
{
enable_pci_map = enable;
}
phys_addr_t map_to_sysmem(const void *ptr)
{
return (u8 *)ptr - gd->arch.ram_buf;
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
void invalidate_dcache_range(unsigned long start, unsigned long stop)
{
}
int sandbox_read_fdt_from_file(void)
{
struct sandbox_state *state = state_get_current();
const char *fname = state->fdt_fname;
void *blob;
loff_t size;
int err;
int fd;
blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
if (!state->fdt_fname) {
err = fdt_create_empty_tree(blob, 256);
if (!err)
goto done;
printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
return -EINVAL;
}
err = os_get_filesize(fname, &size);
if (err < 0) {
printf("Failed to file FDT file '%s'\n", fname);
return err;
}
fd = os_open(fname, OS_O_RDONLY);
if (fd < 0) {
printf("Failed to open FDT file '%s'\n", fname);
return -EACCES;
}
if (os_read(fd, blob, size) != size) {
os_close(fd);
return -EIO;
}
os_close(fd);
done:
gd->fdt_blob = blob;
return 0;
}
ulong timer_get_boot_us(void)
{
static uint64_t base_count;
uint64_t count = os_get_nsec();
if (!base_count)
base_count = count;
return (count - base_count) / 1000;
}