soc/amd/picasso/agesa_acpi: add BERT support

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I14577e80e722cb5ccf344a4520cf3adde669fc5e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54149
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/soc/amd/picasso/agesa_acpi.c

@@ -3,6 +3,7 @@
 #include <acpi/acpi.h>
 #include <acpi/acpi_crat.h>
 #include <acpi/acpi_ivrs.h>
+#include <arch/bert_storage.h>
 #include <console/console.h>
 #include <cpu/amd/cpuid.h>
 #include <cpu/amd/msr.h>
@@ -1016,3 +1017,22 @@ uintptr_t agesa_write_acpi_tables(const struct device *device, uintptr_t current
 
 	return current;
 }
+
+enum cb_err acpi_soc_get_bert_region(void **region, size_t *length)
+{
+	/*
+	 * Skip the table if no errors are present.  ACPI driver reports
+	 * a table with a 0-length region:
+	 *   BERT: [Firmware Bug]: table invalid.
+	 */
+	if (!bert_should_generate_acpi_table())
+		return CB_ERR;
+
+	bert_errors_region(region, length);
+	if (!region) {
+		printk(BIOS_ERR, "Error: Can't find BERT storage area\n");
+		return CB_ERR;
+	}
+
+	return CB_SUCCESS;
+}