[U-Boot] [PATCH v1 19/21] sparc: leon3: Added CPU count and frequency detection.

[Francois Retief]

From: Daniel Hellstrom <daniel at gaisler.com>

Signed-off-by: Daniel Hellstrom <daniel at gaisler.com>
Signed-off-by: Francois Retief <fgretief at spaceteq.co.za>
---

 arch/sparc/cpu/leon3/cpu.c     | 46 +++++++++++++++++++++++++++++++++++++++++-
 arch/sparc/include/asm/leon3.h | 13 ++++++++++++
 2 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/arch/sparc/cpu/leon3/cpu.c b/arch/sparc/cpu/leon3/cpu.c
index 7034be6..149e5c6 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 6ee1ea8..a9f32b9 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
-- 
2.4.3