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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-11-07 14:27:33 +1100
committerPaul Mackerras <paulus@samba.org>2005-11-08 11:17:34 +1100
commit4350147a816b9c5b40fa59e4fa23f17490630b79 (patch)
treec333986047de60aa90809d669895726610c0c3e5 /include/asm-powerpc
parenta82765b6eee3d1267ded3320ca67b39fe1844599 (diff)
[PATCH] ppc64: SMU based macs cpufreq support
CPU freq support using 970FX powertune facility for iMac G5 and SMU based single CPU desktop. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/reg.h9
-rw-r--r--include/asm-powerpc/smu.h60
2 files changed, 67 insertions, 2 deletions
diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h
index da848412f11..489cf4c99c2 100644
--- a/include/asm-powerpc/reg.h
+++ b/include/asm-powerpc/reg.h
@@ -396,6 +396,9 @@
#define SPRN_VRSAVE 0x100 /* Vector Register Save Register */
#define SPRN_XER 0x001 /* Fixed Point Exception Register */
+#define SPRN_SCOMC 0x114 /* SCOM Access Control */
+#define SPRN_SCOMD 0x115 /* SCOM Access DATA */
+
/* Performance monitor SPRs */
#ifdef CONFIG_PPC64
#define SPRN_MMCR0 795
@@ -594,7 +597,11 @@ static inline void ppc64_runlatch_off(void)
mtspr(SPRN_CTRLT, ctrl);
}
}
-#endif
+
+extern unsigned long scom970_read(unsigned int address);
+extern void scom970_write(unsigned int address, unsigned long value);
+
+#endif /* CONFIG_PPC64 */
#define __get_SP() ({unsigned long sp; \
asm volatile("mr %0,1": "=r" (sp)); sp;})
diff --git a/include/asm-powerpc/smu.h b/include/asm-powerpc/smu.h
index dee8eefe47b..959bad66023 100644
--- a/include/asm-powerpc/smu.h
+++ b/include/asm-powerpc/smu.h
@@ -144,7 +144,11 @@
* - lenght 8 ("VSLEWxyz") has 3 additional bytes appended, and is
* used to set the voltage slewing point. The SMU replies with "DONE"
* I yet have to figure out their exact meaning of those 3 bytes in
- * both cases.
+ * both cases. They seem to be:
+ * x = processor mask
+ * y = op. point index
+ * z = processor freq. step index
+ * I haven't yet decyphered result codes
*
*/
#define SMU_CMD_POWER_COMMAND 0xaa
@@ -333,6 +337,60 @@ extern int smu_queue_i2c(struct smu_i2c_cmd *cmd);
#endif /* __KERNEL__ */
+
+/*
+ * - SMU "sdb" partitions informations -
+ */
+
+
+/*
+ * Partition header format
+ */
+struct smu_sdbp_header {
+ __u8 id;
+ __u8 len;
+ __u8 version;
+ __u8 flags;
+};
+
+/*
+ * 32 bits integers are usually encoded with 2x16 bits swapped,
+ * this demangles them
+ */
+#define SMU_U32_MIX(x) ((((x) << 16) & 0xffff0000u) | (((x) >> 16) & 0xffffu))
+
+/* This is the definition of the SMU sdb-partition-0x12 table (called
+ * CPU F/V/T operating points in Darwin). The definition for all those
+ * SMU tables should be moved to some separate file
+ */
+#define SMU_SDB_FVT_ID 0x12
+
+struct smu_sdbp_fvt {
+ __u32 sysclk; /* Base SysClk frequency in Hz for
+ * this operating point
+ */
+ __u8 pad;
+ __u8 maxtemp; /* Max temp. supported by this
+ * operating point
+ */
+
+ __u16 volts[3]; /* CPU core voltage for the 3
+ * PowerTune modes, a mode with
+ * 0V = not supported.
+ */
+};
+
+#ifdef __KERNEL__
+/*
+ * This returns the pointer to an SMU "sdb" partition data or NULL
+ * if not found. The data format is described below
+ */
+extern struct smu_sdbp_header *smu_get_sdb_partition(int id,
+ unsigned int *size);
+
+#endif /* __KERNEL__ */
+
+
/*
* - Userland interface -
*/