diff options
| author | Daniel Hellstrom <daniel@gaisler.com> | 2010-01-22 13:25:03 +0100 |
|---|---|---|
| committer | Francois Retief <fgretief@spaceteq.co.za> | 2015-12-03 13:15:49 +0200 |
| commit | 6c4359aa7284bf7bc6d9f83a2c6dceb406726388 (patch) | |
| tree | 8645444d717def2d372e0c0b520eea85b6600cac /arch | |
| parent | 36594a1dfb96e5ebb54996fb36769d45cda38207 (diff) | |
sparc: leon3: Added CPU count and frequency detection.
Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sparc/cpu/leon3/cpu.c | 46 | ||||
| -rw-r--r-- | arch/sparc/include/asm/leon3.h | 13 |
2 files changed, 58 insertions, 1 deletions
diff --git a/arch/sparc/cpu/leon3/cpu.c b/arch/sparc/cpu/leon3/cpu.c index 7034be60ec..149e5c69e6 100644 --- a/arch/sparc/cpu/leon3/cpu.c +++ b/arch/sparc/cpu/leon3/cpu.c @@ -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; } diff --git a/arch/sparc/include/asm/leon3.h b/arch/sparc/include/asm/leon3.h index 6ee1ea8744..a9f32b9b90 100644 --- a/arch/sparc/include/asm/leon3.h +++ b/arch/sparc/include/asm/leon3.h @@ -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 |