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-rw-r--r--src/acpi/Makefile.inc2
-rw-r--r--src/acpi/chromeos-gnvs.c18
-rw-r--r--src/acpi/gnvs.c69
-rw-r--r--src/include/acpi/acpi_gnvs.h19
4 files changed, 108 insertions, 0 deletions
diff --git a/src/acpi/Makefile.inc b/src/acpi/Makefile.inc
index 7e37e1a871..29ddc08d96 100644
--- a/src/acpi/Makefile.inc
+++ b/src/acpi/Makefile.inc
@@ -8,6 +8,8 @@ ramstage-y += acpigen_dsm.c
ramstage-y += acpigen_ps2_keybd.c
ramstage-y += acpigen_usb.c
ramstage-y += device.c
+ramstage-$(CONFIG_CHROMEOS) += chromeos-gnvs.c
+ramstage-y += gnvs.c
ramstage-y += pld.c
ramstage-y += sata.c
ramstage-y += soundwire.c
diff --git a/src/acpi/chromeos-gnvs.c b/src/acpi/chromeos-gnvs.c
new file mode 100644
index 0000000000..d30e204463
--- /dev/null
+++ b/src/acpi/chromeos-gnvs.c
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi_gnvs.h>
+#include <types.h>
+#include <ec/google/chromeec/ec.h>
+#include <vendorcode/google/chromeos/gnvs.h>
+
+void gnvs_assign_chromeos(void)
+{
+ chromeos_acpi_t *gnvs_chromeos = gnvs_chromeos_ptr();
+ chromeos_init_chromeos_acpi(gnvs_chromeos);
+
+ /* EC can override to ECFW_RW. */
+ gnvs_chromeos->vbt2 = ACTIVE_ECFW_RO;
+
+ if (CONFIG(EC_GOOGLE_CHROMEEC) && !google_ec_running_ro())
+ gnvs_chromeos->vbt2 = ACTIVE_ECFW_RW;
+}
diff --git a/src/acpi/gnvs.c b/src/acpi/gnvs.c
new file mode 100644
index 0000000000..fbc84b36fd
--- /dev/null
+++ b/src/acpi/gnvs.c
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <acpi/acpi_gnvs.h>
+#include <acpi/acpigen.h>
+#include <cbmem.h>
+#include <console/console.h>
+#include <string.h>
+#include <types.h>
+
+static void *gnvs;
+
+void *acpi_get_gnvs(void)
+{
+ if (gnvs)
+ return gnvs;
+
+ gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
+ if (gnvs)
+ return gnvs;
+
+ printk(BIOS_ERR, "Unable to locate Global NVS\n");
+ return NULL;
+}
+
+static void gnvs_assign_cbmc(void)
+{
+ uint32_t *gnvs_cbmc = gnvs_cbmc_ptr();
+ if (gnvs_cbmc)
+ *gnvs_cbmc = (uintptr_t)cbmem_find(CBMEM_ID_CONSOLE);
+}
+
+void *gnvs_get_or_create(void)
+{
+ size_t gnvs_size;
+
+ if (gnvs)
+ return gnvs;
+
+ gnvs = cbmem_find(CBMEM_ID_ACPI_GNVS);
+ if (gnvs)
+ return gnvs;
+
+ gnvs_size = gnvs_size_of_array();
+
+ gnvs = cbmem_add(CBMEM_ID_ACPI_GNVS, gnvs_size);
+ if (!gnvs)
+ return gnvs;
+
+ memset(gnvs, 0, gnvs_size);
+
+ if (CONFIG(CONSOLE_CBMEM))
+ gnvs_assign_cbmc();
+
+ if (CONFIG(CHROMEOS))
+ gnvs_assign_chromeos();
+
+ return gnvs;
+}
+
+void acpi_inject_nvsa(void)
+{
+ uintptr_t gnvs_address = (uintptr_t)acpi_get_gnvs();
+ if (!gnvs_address)
+ return;
+
+ acpigen_write_scope("\\");
+ acpigen_write_name_dword("NVSA", gnvs_address);
+ acpigen_pop_len();
+}
diff --git a/src/include/acpi/acpi_gnvs.h b/src/include/acpi/acpi_gnvs.h
new file mode 100644
index 0000000000..cc0c4710ae
--- /dev/null
+++ b/src/include/acpi/acpi_gnvs.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __ACPI_GNVS_H__
+#define __ACPI_GNVS_H__
+
+#include <types.h>
+
+void *acpi_get_gnvs(void);
+void *gnvs_get_or_create(void);
+void acpi_inject_nvsa(void);
+
+void gnvs_assign_chromeos(void);
+
+/* Platform code must implement these. */
+size_t gnvs_size_of_array(void);
+uint32_t *gnvs_cbmc_ptr(void);
+void *gnvs_chromeos_ptr(void);
+
+#endif