u-boot/arch/sandbox/cpu/cpu.c
Simon Glass 5c2859cdc3 sandbox: Allow reading/writing of RAM buffer
It is useful to be able to save and restore the RAM contents of sandbox
U-Boot either for setting up tests, for later analysys, or for chaining
together multiple tests which need to keep the same memory contents.

Add a function to provide a memory file for U-Boot. This is read on
start-up and written when shutting down. If the file does not exist
on start-up, it will be created when shutting down.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-01-08 17:25:03 -07:00

68 lines
1.2 KiB
C

/*
* Copyright (c) 2011 The Chromium OS Authors.
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <os.h>
#include <asm/state.h>
DECLARE_GLOBAL_DATA_PTR;
void reset_cpu(ulong ignored)
{
if (state_uninit())
os_exit(2);
/* This is considered normal termination for now */
os_exit(0);
}
int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
reset_cpu(0);
return 0;
}
/* delay x useconds */
void __udelay(unsigned long usec)
{
os_usleep(usec);
}
unsigned long __attribute__((no_instrument_function)) timer_get_us(void)
{
return os_get_nsec() / 1000;
}
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
{
if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
printf("## Transferring control to Linux (at address %08lx)...\n",
images->ep);
reset_cpu(0);
}
return 0;
}
int cleanup_before_linux(void)
{
return 0;
}
void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
return (void *)(gd->arch.ram_buf + paddr);
}
phys_addr_t map_to_sysmem(void *ptr)
{
return (u8 *)ptr - gd->arch.ram_buf;
}
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}