[SeaBIOS] [PATCH v2 08/19] Add find_pmtimer() function
David Woodhouse
dwmw2 at infradead.org
Tue Feb 5 17:47:47 CET 2013
From: David Woodhouse <David.Woodhouse at intel.com>
With CSM (and maybe coreboot) we'll want to find the pmtimer from the ACPI
tables, instead of knowing where it is and *putting* it into the ACPI
tables.
Extract the first part of the existing find_resume_vector() function into
a find_fadt() function, and use it from both find_resume_vector() and our
new find_pmtimer().
Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
src/acpi.c | 46 ++++++++++++++++++++++++++++++++++------------
src/acpi.h | 1 +
2 files changed, 35 insertions(+), 12 deletions(-)
diff --git a/src/acpi.c b/src/acpi.c
index 03cda34..d4fe92e 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -889,16 +889,16 @@ acpi_setup(void)
dprintf(1, "ACPI tables: RSDP=%p RSDT=%p\n", rsdp, rsdt);
}
-u32
-find_resume_vector(void)
+static struct fadt_descriptor_rev1 *
+find_fadt(void)
{
dprintf(4, "rsdp=%p\n", RsdpAddr);
if (!RsdpAddr || RsdpAddr->signature != RSDP_SIGNATURE)
- return 0;
+ return NULL;
struct rsdt_descriptor_rev1 *rsdt = (void*)RsdpAddr->rsdt_physical_address;
dprintf(4, "rsdt=%p\n", rsdt);
if (!rsdt || rsdt->signature != RSDT_SIGNATURE)
- return 0;
+ return NULL;
void *end = (void*)rsdt + rsdt->length;
int i;
for (i=0; (void*)&rsdt->table_offset_entry[i] < end; i++) {
@@ -906,13 +906,35 @@ find_resume_vector(void)
if (!fadt || fadt->signature != FACP_SIGNATURE)
continue;
dprintf(4, "fadt=%p\n", fadt);
- struct facs_descriptor_rev1 *facs = (void*)fadt->firmware_ctrl;
- dprintf(4, "facs=%p\n", facs);
- if (! facs || facs->signature != FACS_SIGNATURE)
- return 0;
- // Found it.
- dprintf(4, "resume addr=%d\n", facs->firmware_waking_vector);
- return facs->firmware_waking_vector;
+ return fadt;
}
- return 0;
+ return NULL;
+}
+
+u32
+find_resume_vector(void)
+{
+ struct fadt_descriptor_rev1 *fadt = find_fadt();
+ if (!fadt)
+ return 0;
+ struct facs_descriptor_rev1 *facs = (void*)fadt->firmware_ctrl;
+ dprintf(4, "facs=%p\n", facs);
+ if (! facs || facs->signature != FACS_SIGNATURE)
+ return 0;
+ // Found it.
+ dprintf(4, "resume addr=%d\n", facs->firmware_waking_vector);
+ return facs->firmware_waking_vector;
+}
+
+void
+find_pmtimer(void)
+{
+ struct fadt_descriptor_rev1 *fadt = find_fadt();
+ if (!fadt)
+ return;
+ u32 pm_tmr = fadt->pm_tmr_blk;
+ if (!pm_tmr)
+ return;
+
+ pmtimer_setup(pm_tmr, 3579);
}
diff --git a/src/acpi.h b/src/acpi.h
index 8bbf25c..e52470e 100644
--- a/src/acpi.h
+++ b/src/acpi.h
@@ -5,6 +5,7 @@
void acpi_setup(void);
u32 find_resume_vector(void);
+void find_pmtimer(void);
#define RSDP_SIGNATURE 0x2052545020445352LL // "RSD PTR "
--
1.8.1
More information about the SeaBIOS
mailing list