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/* 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
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