SPEEDSTEP: write _CST tables

Change-Id: Idb4b57044808918de343d31519768d0986840f01
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/321
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index 7feaa8e1309550baf497acdfb96c22244d8bac9b..0833371d83994632c9d444399ae510f190db65e9 100644 (file)
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -66,4 +66,6 @@ int acpigen_write_resourcetemplate_footer(int len);
 int acpigen_write_mainboard_resource_template(void);
 int acpigen_write_mainboard_resources(const char *scope, const char *name);
 
+int get_cst_entries(struct cst_entry **) __attribute__((weak));
+
 #endif

diff --git a/src/cpu/intel/speedstep/acpi.c b/src/cpu/intel/speedstep/acpi.c
index 48e1a3cedc3fa1420bdb7ad93cd65c3c6bef32cf..8f32e4f630eebdc0191ae6751d1af8969828a649 100644 (file)
--- a/src/cpu/intel/speedstep/acpi.c
+++ b/src/cpu/intel/speedstep/acpi.c
@@ -62,6 +62,11 @@ static int get_fsb(void)
        return 200;
 }
 
+int get_cst_entries(struct cst_entry **entries __attribute__((unused)))
+{
+       return 0;
+}
+
 void generate_cpu_entries(void)
 {
        int len_pr, len_ps;
@@ -70,6 +75,9 @@ void generate_cpu_entries(void)
        int totalcores = determine_total_number_of_cores();
        int cores_per_package = (cpuid_ebx(1)>>16) & 0xff;
        int numcpus = totalcores/cores_per_package; // this assumes that all CPUs share the same layout
+       int count;
+       struct cst_entry *cst_entries;
+
        printk(BIOS_DEBUG, "Found %d CPU(s) with %d core(s) each.\n", numcpus, cores_per_package);
 
        for (cpuID=1; cpuID <=numcpus; cpuID++) {
@@ -81,6 +89,8 @@ void generate_cpu_entries(void)
                len_pr = acpigen_write_processor((cpuID-1)*cores_per_package+coreID-1, pcontrol_blk, plen);
                        len_pr += acpigen_write_empty_PCT();
                        len_pr += acpigen_write_PSD_package(cpuID-1,cores_per_package,SW_ANY);
+                       if ((count = get_cst_entries(&cst_entries)) > 0)
+                               len_pr += acpigen_write_CST_package(cst_entries, count);
                        len_pr += acpigen_write_name("_PSS");
 
                        int max_states=8;