[U-Boot] [PATCH 10/17] LEON3: added CPU count and frequency detection.

[Daniel Hellstrom]

Signed-off-by: Daniel Hellstrom <dan...@gaisler.com>
---
 arch/sparc/cpu/leon3/cpu.c     |   42 +++++++++++++++++++++++++++++++++++++++-
 arch/sparc/include/asm/leon3.h |   13 ++++++++++++
 2 files changed, 54 insertions(+), 1 deletions(-)

diff --git a/arch/sparc/cpu/leon3/cpu.c b/arch/sparc/cpu/leon3/cpu.c
index 976f311..5cc9513 100644
--- a/arch/sparc/cpu/leon3/cpu.c
+++ b/arch/sparc/cpu/leon3/cpu.c
@@ -29,15 +29,55 @@
 
 #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);
+}
+
 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 b90d35b..60396c4 100644
--- a/arch/sparc/include/asm/leon3.h
+++ b/arch/sparc/include/asm/leon3.h
@@ -33,4 +33,17 @@
  * 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
-- 
1.5.4

_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot