summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/mach-au1x00
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/include/asm/mach-au1x00')
-rw-r--r--arch/mips/include/asm/mach-au1x00/au1000.h58
1 files changed, 38 insertions, 20 deletions
diff --git a/arch/mips/include/asm/mach-au1x00/au1000.h b/arch/mips/include/asm/mach-au1x00/au1000.h
index d07632e3230b..5db26e60a8c5 100644
--- a/arch/mips/include/asm/mach-au1x00/au1000.h
+++ b/arch/mips/include/asm/mach-au1x00/au1000.h
@@ -91,6 +91,44 @@ static inline u32 au_readl(unsigned long reg)
return *(volatile u32 *)reg;
}
+/* Early Au1000 have a write-only SYS_CPUPLL register. */
+static inline int au1xxx_cpu_has_pll_wo(void)
+{
+ switch (read_c0_prid()) {
+ case 0x00030100: /* Au1000 DA */
+ case 0x00030201: /* Au1000 HA */
+ case 0x00030202: /* Au1000 HB */
+ return 1;
+ }
+ return 0;
+}
+
+/* does CPU need CONFIG[OD] set to fix tons of errata? */
+static inline int au1xxx_cpu_needs_config_od(void)
+{
+ /*
+ * c0_config.od (bit 19) was write only (and read as 0) on the
+ * early revisions of Alchemy SOCs. It disables the bus trans-
+ * action overlapping and needs to be set to fix various errata.
+ */
+ switch (read_c0_prid()) {
+ case 0x00030100: /* Au1000 DA */
+ case 0x00030201: /* Au1000 HA */
+ case 0x00030202: /* Au1000 HB */
+ case 0x01030200: /* Au1500 AB */
+ /*
+ * Au1100/Au1200 errata actually keep silence about this bit,
+ * so we set it just in case for those revisions that require
+ * it to be set according to the (now gone) cpu_table.
+ */
+ case 0x02030200: /* Au1100 AB */
+ case 0x02030201: /* Au1100 BA */
+ case 0x02030202: /* Au1100 BC */
+ case 0x04030201: /* Au1200 AC */
+ return 1;
+ }
+ return 0;
+}
/* arch/mips/au1000/common/clocks.c */
extern void set_au1x00_speed(unsigned int new_freq);
@@ -1739,24 +1777,4 @@ static AU1X00_SYS * const sys = (AU1X00_SYS *)SYS_BASE;
#endif
-/*
- * Processor information based on PRID.
- * Copied from PowerPC.
- */
-#ifndef _LANGUAGE_ASSEMBLY
-struct cpu_spec {
- /* CPU is matched via (PRID & prid_mask) == prid_value */
- unsigned int prid_mask;
- unsigned int prid_value;
-
- char *cpu_name;
- unsigned char cpu_od; /* Set Config[OD] */
- unsigned char cpu_bclk; /* Enable BCLK switching */
- unsigned char cpu_pll_wo; /* sys_cpupll reg. write-only */
-};
-
-extern struct cpu_spec cpu_specs[];
-extern struct cpu_spec *cur_cpu_spec[];
-#endif
-
#endif