mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 05:42:58 +00:00
113 lines
1.9 KiB
C
113 lines
1.9 KiB
C
/* CPU specific code for the LEON3 CPU
|
|
*
|
|
* (C) Copyright 2007, 2015
|
|
* Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <watchdog.h>
|
|
#include <command.h>
|
|
#include <netdev.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/processor.h>
|
|
#include <ambapp.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
extern void _reset_reloc(void);
|
|
|
|
int leon_cpu_cnt = 1;
|
|
int leon_ver = 3;
|
|
unsigned int leon_cpu_freq = CONFIG_SYS_CLK_FREQ;
|
|
|
|
int cpu_freq(void)
|
|
{
|
|
ambapp_ahbdev dev;
|
|
|
|
if (leon_ver == 3) {
|
|
ambapp_ahbmst_find(&ambapp_plb, VENDOR_GAISLER,
|
|
GAISLER_LEON3, 0, &dev);
|
|
} else {
|
|
ambapp_ahbmst_find(&ambapp_plb, VENDOR_GAISLER,
|
|
GAISLER_LEON4, 0, &dev);
|
|
}
|
|
|
|
leon_cpu_freq = ambapp_bus_freq(&ambapp_plb, dev.ahb_bus_index);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int checkcpu(void)
|
|
{
|
|
int cnt;
|
|
char str[4];
|
|
|
|
/* check LEON version here */
|
|
cnt = ambapp_ahbmst_count(&ambapp_plb, VENDOR_GAISLER, GAISLER_LEON3);
|
|
if (cnt <= 0) {
|
|
cnt = ambapp_ahbmst_count(&ambapp_plb, VENDOR_GAISLER,
|
|
GAISLER_LEON4);
|
|
if (cnt > 0)
|
|
leon_ver = 4;
|
|
}
|
|
|
|
cpu_freq();
|
|
|
|
str[0] = '\0';
|
|
if (cnt > 1) {
|
|
leon_cpu_cnt = cnt;
|
|
str[0] = '0' + cnt;
|
|
str[1] = 'x';
|
|
str[2] = '\0';
|
|
}
|
|
printf("CPU: %sLEON%d @ %dMHz\n", str, leon_ver,
|
|
leon_cpu_freq / 1000000);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DISPLAY_CPUINFO
|
|
|
|
int print_cpuinfo(void)
|
|
{
|
|
printf("CPU: LEON3\n");
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
void cpu_reset(void)
|
|
{
|
|
/* Interrupts off */
|
|
disable_interrupts();
|
|
|
|
/* jump to restart in flash */
|
|
_reset_reloc();
|
|
}
|
|
|
|
int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
cpu_reset();
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
u64 flash_read64(void *addr)
|
|
{
|
|
return __raw_readq(addr);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#ifdef CONFIG_GRETH
|
|
int cpu_eth_init(bd_t *bis)
|
|
{
|
|
return greth_initialize(bis);
|
|
}
|
|
#endif
|