soc/intel/skylake: Use common systemagent code

This patch perform resource mapping for PCI,
fixed MMIO, DRAM and IMR's based on inputs given by SoC.

TEST=Ensure PCI root bridge 0:0:0 memory resource allocation
remains same between previous implementation and current
implementation.

Change-Id: I93567a79b2d12dd5d6363957e55ce2cb86ff83a7
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/19796
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 26 insertions, 392 deletions

diff --git a/src/soc/intel/skylake/systemagent.c b/src/soc/intel/skylake/systemagent.c
index 05603d160c..6149fa2126 100644
--- a/src/soc/intel/skylake/systemagent.c
+++ b/src/soc/intel/skylake/systemagent.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2007-2009 coresystems GmbH
  * Copyright (C) 2014 Google Inc.
- * Copyright (C) 2015 Intel Corporation.
+ * Copyright (C) 2015-2017 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
@@ -16,415 +16,49 @@
  */
 
 #include <console/console.h>
-#include <arch/acpi.h>
-#include <arch/io.h>
-#include <stdint.h>
 #include <delay.h>
 #include <device/device.h>
-#include <device/pci.h>
-#include <device/pci_ids.h>
-#include <stdlib.h>
-#include <string.h>
-#include <cbmem.h>
-#include <romstage_handoff.h>
-#include <vendorcode/google/chromeos/chromeos.h>
+#include <intelblocks/systemagent.h>
 #include <soc/cpu.h>
 #include <soc/iomap.h>
-#include <soc/pci_devs.h>
-#include <soc/ramstage.h>
 #include <soc/systemagent.h>
 
-u8 systemagent_revision(void)
-{
-	return pci_read_config8(SA_DEV_ROOT, PCI_REVISION_ID);
-}
-
-static int get_pcie_bar(device_t dev, unsigned int index, u32 *base, u32 *len)
-{
-	u32 pciexbar_reg;
-
-	*base = 0;
-	*len = 0;
-
-	pciexbar_reg = pci_read_config32(dev, index);
-
-	if (!(pciexbar_reg & (1 << 0)))
-		return 0;
-
-	switch ((pciexbar_reg >> 1) & 3) {
-	case 0: /* 256MB */
-		*base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|
-					(1 << 28));
-		*len = 256 * 1024 * 1024;
-		return 1;
-	case 1: /* 128M */
-		*base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|
-					(1 << 28)|(1 << 27));
-		*len = 128 * 1024 * 1024;
-		return 1;
-	case 2: /* 64M */
-		*base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|
-					(1 << 28)|(1 << 27)|(1 << 26));
-		*len = 64 * 1024 * 1024;
-		return 1;
-	}
-
-	return 0;
-}
-
-static int get_bar(device_t dev, unsigned int index, u32 *base, u32 *len)
-{
-	u32 bar;
-
-	bar = pci_read_config32(dev, index);
-
-	/* If not enabled don't report it. */
-	if (!(bar & 0x1))
-		return 0;
-
-	/* Knock down the enable bit. */
-	*base = bar & ~1;
-
-	return 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.
+ * SoC implementation
+ *
+ * Add all known fixed memory ranges for Host Controller/Mmeory
+ * controller.
  */
-static int get_bar_in_mchbar(device_t dev, unsigned int index, u32 *base,
-			     u32 *len)
+void soc_add_fixed_mmio_resources(struct device *dev, int *index)
 {
-	u32 bar;
-
-	bar = MCHBAR32(index);
-
-	/* If not enabled don't report it. */
-	if (!(bar & 0x1))
-		return 0;
-
-	/* Knock down the enable bit. */
-	*base = bar & ~1;
-
-	return 1;
+	static const struct sa_mmio_descriptor soc_fixed_resources[] = {
+		{ PCIEXBAR, CONFIG_MMCONF_BASE_ADDRESS, CONFIG_SA_PCIEX_LENGTH,
+				"PCIEXBAR" },
+		{ MCHBAR, MCH_BASE_ADDRESS, MCH_BASE_SIZE, "MCHBAR" },
+		{ DMIBAR, DMI_BASE_ADDRESS, DMI_BASE_SIZE, "DMIBAR" },
+		{ EPBAR, EP_BASE_ADDRESS, EP_BASE_SIZE, "EPBAR" },
+		{ GDXCBAR, GDXC_BASE_ADDRESS, GDXC_BASE_SIZE, "GDXCBAR" },
+		{ EDRAMBAR, EDRAM_BASE_ADDRESS, EDRAM_BASE_SIZE, "EDRAMBAR" },
+	};
+
+	sa_add_fixed_mmio_resources(dev, index, soc_fixed_resources,
+			ARRAY_SIZE(soc_fixed_resources));
 }
 
-struct fixed_mmio_descriptor {
-	unsigned int index;
-	u32 size;
-	int (*get_resource)(device_t dev, unsigned int index,
-			    u32 *base, u32 *size);
-	const char *description;
-};
-
-struct fixed_mmio_descriptor mc_fixed_resources[] = {
-	{ PCIEXBAR, 0,               get_pcie_bar,      "PCIEXBAR" },
-	{ MCHBAR,   MCH_BASE_SIZE,   get_bar,           "MCHBAR"   },
-	{ DMIBAR,   DMI_BASE_SIZE,   get_bar,           "DMIBAR"   },
-	{ EPBAR,    EP_BASE_SIZE,    get_bar,           "EPBAR"    },
-	{ GDXCBAR,  GDXC_BASE_SIZE,  get_bar_in_mchbar, "GDXCBAR"  },
-	{ EDRAMBAR, EDRAM_BASE_SIZE, get_bar_in_mchbar, "EDRAMBAR" },
-};
-
 /*
- * Add all known fixed MMIO ranges that hang off the host bridge/memory
- * controller device.
+ * SoC implementation
+ *
+ * Perform System Agent Initialization during Ramstage phase.
  */
-static void mc_add_fixed_mmio_resources(device_t dev)
+void soc_systemagent_init(struct device *dev)
 {
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(mc_fixed_resources); i++) {
-		u32 base;
-		u32 size;
-		struct resource *resource;
-		unsigned int index;
-
-		size = mc_fixed_resources[i].size;
-		index = mc_fixed_resources[i].index;
-		if (!mc_fixed_resources[i].get_resource(dev, index,
-							&base, &size))
-			continue;
-
-		resource = new_resource(dev, mc_fixed_resources[i].index);
-		resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
-				  IORESOURCE_STORED | IORESOURCE_RESERVE |
-				  IORESOURCE_ASSIGNED;
-		resource->base = base;
-		resource->size = size;
-		printk(BIOS_DEBUG, "%s: Adding %s @ %x 0x%08lx-0x%08lx.\n",
-		       __func__, mc_fixed_resources[i].description, index,
-		       (unsigned long)base, (unsigned long)(base + size - 1));
-	}
-}
-
-struct map_entry {
-	int reg;
-	int is_64_bit;
-	int is_limit;
-	const char *description;
-};
-
-static void read_map_entry(device_t dev, struct map_entry *entry,
-			   uint64_t *result)
-{
-	uint64_t value;
-	uint64_t mask;
-
-	/* All registers are on a 1MiB granularity. */
-	mask = ((1ULL<<20)-1);
-	mask = ~mask;
-
-	value = 0;
-
-	if (entry->is_64_bit) {
-		value = pci_read_config32(dev, entry->reg + 4);
-		value <<= 32;
-	}
-
-	value |= (uint64_t) pci_read_config32(dev, entry->reg);
-	value &= mask;
-
-	if (entry->is_limit)
-		value |= ~mask;
-
-	*result = value;
-}
-
-#define MAP_ENTRY(reg_, is_64_, is_limit_, desc_) \
-	{ \
-		.reg = reg_,           \
-		.is_64_bit = is_64_,   \
-		.is_limit = is_limit_, \
-		.description = desc_,  \
-	}
-
-#define MAP_ENTRY_BASE_64(reg_, desc_) \
-	MAP_ENTRY(reg_, 1, 0, desc_)
-#define MAP_ENTRY_LIMIT_64(reg_, desc_) \
-	MAP_ENTRY(reg_, 1, 1, desc_)
-#define MAP_ENTRY_BASE_32(reg_, desc_) \
-	MAP_ENTRY(reg_, 0, 0, desc_)
-
-enum {
-	TOM_REG,
-	TOUUD_REG,
-	MESEG_BASE_REG,
-	MESEG_LIMIT_REG,
-	REMAP_BASE_REG,
-	REMAP_LIMIT_REG,
-	TOLUD_REG,
-	BGSM_REG,
-	BDSM_REG,
-	TSEG_REG,
-	/* Must be last. */
-	NUM_MAP_ENTRIES
-};
-
-static struct map_entry memory_map[NUM_MAP_ENTRIES] = {
-	[TOM_REG] = MAP_ENTRY_BASE_64(TOM, "TOM"),
-	[TOUUD_REG] = MAP_ENTRY_BASE_64(TOUUD, "TOUUD"),
-	[MESEG_BASE_REG] = MAP_ENTRY_BASE_64(MESEG_BASE, "MESEG_BASE"),
-	[MESEG_LIMIT_REG] = MAP_ENTRY_LIMIT_64(MESEG_LIMIT, "MESEG_LIMIT"),
-	[REMAP_BASE_REG] = MAP_ENTRY_BASE_64(REMAPBASE, "REMAP_BASE"),
-	[REMAP_LIMIT_REG] = MAP_ENTRY_LIMIT_64(REMAPLIMIT, "REMAP_LIMIT"),
-	[TOLUD_REG] = MAP_ENTRY_BASE_32(TOLUD, "TOLUD"),
-	[BDSM_REG] = MAP_ENTRY_BASE_32(BDSM, "BDSM"),
-	[BGSM_REG] = MAP_ENTRY_BASE_32(BGSM, "BGSM"),
-	[TSEG_REG] = MAP_ENTRY_BASE_32(TSEG, "TESGMB"),
-};
-
-static void mc_read_map_entries(device_t dev, uint64_t *values)
-{
-	int i;
-	for (i = 0; i < NUM_MAP_ENTRIES; i++)
-		read_map_entry(dev, &memory_map[i], &values[i]);
-}
-
-static void mc_report_map_entries(device_t dev, uint64_t *values)
-{
-	int i;
-	for (i = 0; i < NUM_MAP_ENTRIES; i++) {
-		printk(BIOS_DEBUG, "MC MAP: %s: 0x%llx\n",
-		       memory_map[i].description, values[i]);
-	}
-	/* One can validate the BDSM and BGSM against the GGC. */
-	printk(BIOS_DEBUG, "MC MAP: GGC: 0x%x\n", pci_read_config16(dev, GGC));
-}
-
-static void mc_add_dram_resources(device_t dev)
-{
-	unsigned long base_k, size_k;
-	unsigned long touud_k;
-	unsigned long index;
-	struct resource *resource;
-	uint64_t mc_values[NUM_MAP_ENTRIES];
-	unsigned long dpr_size = 0;
-	u32 dpr_reg;
-
-	/* Read in the MAP registers and report their values. */
-	mc_read_map_entries(dev, &mc_values[0]);
-	mc_report_map_entries(dev, &mc_values[0]);
-
-	/*
-	 * DMA Protected Range can be reserved below TSEG for PCODE patch
-	 * or TXT/BootGuard related data.  Rather than report a base address
-	 * the DPR register reports the TOP of the region, which is the same
-	 * as TSEG base.  The region size is reported in MiB in bits 11:4.
-	 */
-	dpr_reg = pci_read_config32(SA_DEV_ROOT, DPR);
-	if (dpr_reg & DPR_EPM) {
-		dpr_size = (dpr_reg & DPR_SIZE_MASK) << 16;
-		printk(BIOS_INFO, "DPR SIZE: 0x%lx\n", dpr_size);
-	}
-
-	/*
-	 * These are the host memory ranges that should be added:
-	 * - 0 -> 0xa0000: cacheable
-	 * - 0xc0000 -> top_of_ram : cacheable
-	 * - top_of_ram -> TSEG - DPR: uncacheable
-	 * - TESG - DPR -> BGSM: cacheable with standard MTRRs and reserved
-	 * - BGSM -> TOLUD: not cacheable with standard MTRRs and reserved
-	 * - 4GiB -> TOUUD: cacheable
-	 *
-	 * The default SMRAM space is reserved so that the range doesn't
-	 * have to be saved during S3 Resume. Once marked reserved the OS
-	 * cannot use the memory. This is a bit of an odd place to reserve
-	 * the region, but the CPU devices don't have dev_ops->read_resources()
-	 * called on them.
-	 *
-	 * The range 0xa0000 -> 0xc0000 does not have any resources
-	 * associated with it to handle legacy VGA memory. If this range
-	 * is not omitted the mtrr code will setup the area as cacheable
-	 * causing VGA access to not work.
-	 *
-	 * The TSEG region is mapped as cacheable so that one can perform
-	 * SMRAM relocation faster. Once the SMRR is enabled the SMRR takes
-	 * precedence over the existing MTRRs covering this region.
-	 *
-	 * It should be noted that cacheable entry types need to be added in
-	 * order. The reason is that the current MTRR code assumes this and
-	 * falls over itself if it isn't.
-	 *
-	 * The resource index starts low and should not meet or exceed
-	 * PCI_BASE_ADDRESS_0.
-	 */
-	index = 0;
-
-	/* 0 - > 0xa0000 */
-	base_k = 0;
-	size_k = (0xa0000 >> 10) - base_k;
-	ram_resource(dev, index++, base_k, size_k);
-
-	/* 0xc0000 -> top_of_ram */
-	base_k = 0xc0000 >> 10;
-	size_k = (top_of_32bit_ram() >> 10) - base_k;
-	ram_resource(dev, index++, base_k, size_k);
-
-	/* top_of_ram -> TSEG - DPR */
-	resource = new_resource(dev, index++);
-	resource->base = top_of_32bit_ram();
-	resource->size = mc_values[TSEG_REG] - dpr_size - resource->base;
-	resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
-			  IORESOURCE_STORED | IORESOURCE_RESERVE |
-			  IORESOURCE_ASSIGNED;
-
-	/* TSEG - DPR -> BGSM */
-	resource = new_resource(dev, index++);
-	resource->base = mc_values[TSEG_REG] - dpr_size;
-	resource->size = mc_values[BGSM_REG] - resource->base;
-	resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
-			  IORESOURCE_STORED | IORESOURCE_RESERVE |
-			  IORESOURCE_ASSIGNED | IORESOURCE_CACHEABLE;
-
-	/* BGSM -> TOLUD */
-	resource = new_resource(dev, index++);
-	resource->base = mc_values[BGSM_REG];
-	resource->size = mc_values[TOLUD_REG] - resource->base;
-	resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
-			  IORESOURCE_STORED | IORESOURCE_RESERVE |
-			  IORESOURCE_ASSIGNED;
-
-	/* 4GiB -> TOUUD */
-	base_k = 4096 * 1024; /* 4GiB */
-	touud_k = mc_values[TOUUD_REG] >> 10;
-	size_k = touud_k - base_k;
-	if (touud_k > base_k)
-		ram_resource(dev, index++, base_k, size_k);
-
-	/*
-	 * Reserve everything between A segment and 1MB:
-	 *
-	 * 0xa0000 - 0xbffff: legacy VGA
-	 * 0xc0000 - 0xfffff: RAM
-	 */
-	mmio_resource(dev, index++, (0xa0000 >> 10), (0xc0000 - 0xa0000) >> 10);
-	reserved_ram_resource(dev, index++, (0xc0000 >> 10),
-			      (0x100000 - 0xc0000) >> 10);
-
-	chromeos_reserve_ram_oops(dev, index++);
-}
-
-static void systemagent_read_resources(device_t dev)
-{
-	/* Read standard PCI resources. */
-	pci_dev_read_resources(dev);
-
-	/* Add all fixed MMIO resources. */
-	mc_add_fixed_mmio_resources(dev);
-
-	/* Calculate and add DRAM resources. */
-	mc_add_dram_resources(dev);
-}
-
-static void systemagent_init(struct device *dev)
-{
-	u8 bios_reset_cpl, pair;
-
 	/* Enable Power Aware Interrupt Routing */
-	pair = MCHBAR8(MCH_PAIR);
-	pair &= ~0x7;	/* Clear 2:0 */
-	pair |= 0x4;	/* Fixed Priority */
-	MCHBAR8(MCH_PAIR) = pair;
+	enable_power_aware_intr();
 
-	/*
-	 * 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;
-	printk(BIOS_DEBUG, "Set BIOS_RESET_CPL\n");
+	/* Enable BIOS Reset CPL */
+	enable_bios_reset_cpl();
 
 	/* Configure turbo power limits 1ms after reset complete bit */
 	mdelay(1);
 	set_power_limits(28);
 }
-
-static struct device_operations systemagent_ops = {
-	.read_resources   = &systemagent_read_resources,
-	.set_resources    = &pci_dev_set_resources,
-	.enable_resources = &pci_dev_enable_resources,
-	.init             = &systemagent_init,
-	.ops_pci          = &soc_pci_ops,
-};
-
-static const unsigned short systemagent_ids[] = {
-	PCI_DEVICE_ID_INTEL_SKL_ID_U,
-	PCI_DEVICE_ID_INTEL_SKL_ID_Y,
-	PCI_DEVICE_ID_INTEL_SKL_ID_ULX,
-	PCI_DEVICE_ID_INTEL_SKL_ID_H,
-	PCI_DEVICE_ID_INTEL_SKL_ID_H_EM,
-	PCI_DEVICE_ID_INTEL_KBL_ID_U,
-	PCI_DEVICE_ID_INTEL_KBL_ID_Y,
-	PCI_DEVICE_ID_INTEL_KBL_ID_H,
-	PCI_DEVICE_ID_INTEL_KBL_U_R,
-	0
-};
-
-static const struct pci_driver systemagent_driver __pci_driver = {
-	.ops     = &systemagent_ops,
-	.vendor  = PCI_VENDOR_ID_INTEL,
-	.devices = systemagent_ids
-};