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