Add table driven way to add platform specific reg_script routines

Extend lib/reg_script.c to use a platform table to declare
additional platform specific register access routine functions.
REG_SCRIPT_TYPE_PLATFORM_BASE is the starting value for platform
specific register types.  Additional register access types may be
defined above this value.  The type and access routines are placed
into reg_script_type_table.

The Baytrail type value for IOSF was left the enumeration since it
was already defined and is being used for Braswell.

BRANCH=none
BUG=None
TEST=Use the following steps to test:
1.  Build for a Baytrail platform
2.  Build for the Samus platform
3.  Add a platform_bus_table routine to a platform which returns the
    address of an array of reg_script_bus_entry structures and the
    number of entries in the array.

Change-Id: Ic99d345c4b067c52b4e9c47e59ed4472a05bc1a5
Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Commit-Id: 2d9fecf4287dff6311a81d818603212248f1a248
Original-Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/215645
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Change-Id: I7cd37abc5a08cadb3166d4048f65b919b86ab5db
Original-Reviewed-on: https://chromium-review.googlesource.com/229612
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/9279
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/include/reg_script.h b/src/include/reg_script.h
index 97b4fb00dc..0c0ea01ce5 100644
--- a/src/include/reg_script.h
+++ b/src/include/reg_script.h
@@ -60,6 +60,10 @@ enum {
 	REG_SCRIPT_TYPE_RES,
 	REG_SCRIPT_TYPE_IOSF,
 	REG_SCRIPT_TYPE_MSR,
+
+	/* Insert other platform independent values above this comment */
+
+	REG_SCRIPT_TYPE_PLATFORM_BASE = 0x10000
 };
 
 enum {
@@ -85,6 +89,24 @@ struct reg_script {
 	};
 };
 
+struct reg_script_context {
+	device_t dev;
+	struct resource *res;
+	const struct reg_script *step;
+};
+
+#ifndef __PRE_RAM__
+struct reg_script_bus_entry {
+	int type;
+	uint64_t (*reg_script_read)(struct reg_script_context *ctx);
+	void (*reg_script_write)(struct reg_script_context *ctx);
+};
+
+/* Get the address and length of the platform bus table */
+const struct reg_script_bus_entry *platform_bus_table(size_t *table_entries);
+
+#endif	/* __PRE_RAM */
+
 /* Internal helper Macros. */
 
 #define _REG_SCRIPT_ENCODE_RAW(cmd_, type_, size_, reg_, \
@@ -271,6 +293,8 @@ struct reg_script {
 #define REG_RES_POLL32(bar_, reg_, mask_, value_, timeout_) \
 	REG_SCRIPT_RES(POLL, 32, bar_, reg_, mask_, value_, timeout_)
 
+
+#if CONFIG_SOC_INTEL_BAYTRAIL
 /*
  * IO Sideband Function
  */
@@ -290,6 +314,7 @@ struct reg_script {
 	REG_IOSF_RMW(unit_, reg_, 0xffffffff, value_)
 #define REG_IOSF_POLL(unit_, reg_, mask_, value_, timeout_) \
 	REG_SCRIPT_IOSF(POLL, unit_, reg_, mask_, value_, timeout_)
+#endif	/* CONFIG_SOC_INTEL_BAYTRAIL */
 
 /*
  * CPU Model Specific Register