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sparc: leon3: Added CPU count and frequency detection.

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Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
This commit is contained in:
Daniel Hellstrom 2010-01-22 13:25:03 +01:00 committed by Francois Retief
parent 36594a1dfb
commit 6c4359aa72
2 changed files with 58 additions and 1 deletions
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46
arch/sparc/cpu/leon3/cpu.c
View File

@ -13,15 +13,59 @@
#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 */
printf("CPU: LEON3\n");
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;
}

13
arch/sparc/include/asm/leon3.h
View File

@ -19,4 +19,17 @@
* ctrl, memory controllers etc.
*/
#ifndef __ASSEMBLER__
/* The frequency of the CPU */
extern unsigned int leon_cpu_freq;
/* Number of LEON processors in system */
extern int leon_cpu_cnt;
/* Ver/subversion of CPU */
extern int leon_ver;
#endif /* __ASSEMBLER__ */
#endif