soc/intel/common/block: Add Intel common systemagent support
Add Intel common systemagent support for romstage and ramstage.
Include soc specific macros need to compile systemagent common code.
Change-Id: I969ff187e3d4199864cb2e9c9a13f4d04158e27c
Signed-off-by: V Sowmya <v.sowmya@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/19668
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/soc/intel/common/block/systemagent/systemagent_early.c b/src/soc/intel/common/block/systemagent/systemagent_early.c
new file mode 100644
index 0000000..7cf78e7
--- /dev/null
+++ b/src/soc/intel/common/block/systemagent/systemagent_early.c
@@ -0,0 +1,134 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2017 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/io.h>
+#include <delay.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <intelblocks/systemagent.h>
+#include <soc/iomap.h>
+#include <soc/pci_devs.h>
+#include <soc/systemagent.h>
+#include "systemagent_def.h"
+#include <timer.h>
+
+#if !ENV_RAMSTAGE
+void bootblock_systemagent_early_init(void)
+{
+ uint32_t reg;
+ uint8_t pciexbar_length;
+
+ /*
+ * The PCIEXBAR is assumed to live in the memory mapped IO space under
+ * 4GiB.
+ */
+ reg = 0;
+ pci_io_write_config32(SA_DEV_ROOT, PCIEXBAR + 4, reg);
+
+ /* Get PCI Express Region Length */
+ switch (CONFIG_SA_PCIEX_LENGTH) {
+ case 256 * MiB:
+ pciexbar_length = PCIEXBAR_LENGTH_256MB;
+ break;
+ case 128 * MiB:
+ pciexbar_length = PCIEXBAR_LENGTH_128MB;
+ break;
+ case 64 * MiB:
+ pciexbar_length = PCIEXBAR_LENGTH_64MB;
+ break;
+ default:
+ pciexbar_length = PCIEXBAR_LENGTH_256MB;
+ }
+ reg = CONFIG_MMCONF_BASE_ADDRESS | (pciexbar_length << 1)
+ | PCIEXBAR_PCIEXBAREN;
+ pci_io_write_config32(SA_DEV_ROOT, PCIEXBAR, reg);
+
+ /*
+ * TSEG defines the base of SMM range. BIOS determines the base
+ * of TSEG memory which must be at or below Graphics base of GTT
+ * Stolen memory, hence its better to clear TSEG register early
+ * to avoid power on default non-zero value (if any).
+ */
+ pci_write_config32(SA_DEV_ROOT, TSEG, 0);
+}
+#endif
+
+void sa_set_pci_bar(const struct sa_mmio_descriptor *fixed_set_resources,
+ size_t count)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ uintptr_t base;
+ unsigned int index;
+
+ index = fixed_set_resources[i].index;
+ /* Check if PCI BAR already enabled */
+ base = pci_read_config32(SA_DEV_ROOT, index);
+
+ /* If enabled don't program it. */
+ if (base & 0x1)
+ return;
+
+ base = fixed_set_resources[i].base;
+
+ pci_write_config32(SA_DEV_ROOT, index, base | 1);
+ }
+}
+
+/*
+ * There are special BARs that actually are programmed in the MCHBAR. These
+ * Intel special features, but they do consume resources that need to be
+ * accounted for.
+ */
+void sa_set_mch_bar(const struct sa_mmio_descriptor *fixed_set_resources,
+ size_t count)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ uintptr_t base;
+ unsigned int index;
+
+ base = fixed_set_resources[i].base;
+ index = fixed_set_resources[i].index;
+ write32((void *)(MCH_BASE_ADDRESS + index), base | 1);
+ }
+}
+
+void enable_pam_region(void)
+{
+ /* All read and writes in this region are serviced by DRAM */
+ pci_write_config8(SA_DEV_ROOT, PAM0, 0x30);
+ pci_write_config8(SA_DEV_ROOT, PAM1, 0x33);
+ pci_write_config8(SA_DEV_ROOT, PAM2, 0x33);
+ pci_write_config8(SA_DEV_ROOT, PAM3, 0x33);
+ pci_write_config8(SA_DEV_ROOT, PAM4, 0x33);
+ pci_write_config8(SA_DEV_ROOT, PAM5, 0x33);
+ pci_write_config8(SA_DEV_ROOT, PAM6, 0x33);
+}
+
+void enable_bios_reset_cpl(void)
+{
+ u8 bios_reset_cpl;
+
+ /*
+ * Set bits 0+1 of BIOS_RESET_CPL to indicate to the CPU
+ * that BIOS has initialized memory and power management
+ */
+ bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL);
+ bios_reset_cpl |= 3;
+ MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl;
+}