soc/amd/picasso: Create picasso as a copy of stoneyridge

So that everyone can see what's being updated from stoney, we're
starting with a direct copy of the stoney directory. There are
arguments both for and against doing it this way, but I believe
This the most transparent way.  We've moved much of the duplicated
stoney code into the soc/amd/common directory and will continue
that work as it becomes obvious that we have unchanged code between
the SOCs.

Makefile.inc has been renamed as makefile.inc so that it won't
build in jenkins until the directory is  updated.

Other than that change, this is an exact copy of the stoneyridge
SOC directory which will be updated in the follow-on commits in
the patch train.

TEST=None
BUG=b:130804851

Signed-off-by: Martin Roth <martinroth@chromium.org>
Change-Id: I6809bd1eea304f76dd9000c079b3ed09f94dbd3b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32407
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 155 insertions, 0 deletions

diff --git a/src/soc/amd/picasso/cpu.c b/src/soc/amd/picasso/cpu.c
new file mode 100644
index 0000000000..1d9804d99c
--- /dev/null
+++ b/src/soc/amd/picasso/cpu.c
@@ -0,0 +1,155 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015-2016 Intel Corp.
+ * Copyright (C) 2017 Advanced Micro Devices, Inc.
+ *
+ * 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 <cpu/cpu.h>
+#include <cpu/x86/mp.h>
+#include <cpu/x86/mtrr.h>
+#include <cpu/x86/msr.h>
+#include <cpu/amd/msr.h>
+#include <cpu/x86/lapic.h>
+#include <device/device.h>
+#include <device/pci_ops.h>
+#include <soc/pci_devs.h>
+#include <soc/cpu.h>
+#include <soc/northbridge.h>
+#include <soc/smi.h>
+#include <soc/iomap.h>
+#include <console/console.h>
+
+/*
+ * MP and SMM loading initialization.
+ */
+struct smm_relocation_attrs {
+	uint32_t smbase;
+	uint32_t tseg_base;
+	uint32_t tseg_mask;
+};
+
+static struct smm_relocation_attrs relo_attrs;
+
+/*
+ * Do essential initialization tasks before APs can be fired up -
+ *
+ *  1. Prevent race condition in MTRR solution. Enable MTRRs on the BSP. This
+ *  creates the MTRR solution that the APs will use. Otherwise APs will try to
+ *  apply the incomplete solution as the BSP is calculating it.
+ */
+static void pre_mp_init(void)
+{
+	x86_setup_mtrrs_with_detect();
+	x86_mtrr_check();
+}
+
+static int get_cpu_count(void)
+{
+	return (pci_read_config16(SOC_HT_DEV, D18F0_CPU_CNT) & CPU_CNT_MASK)
+									+ 1;
+}
+
+static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
+				size_t *smm_save_state_size)
+{
+	void *smm_base;
+	size_t smm_size;
+	void *handler_base;
+	size_t handler_size;
+
+	/* Initialize global tracking state. */
+	smm_region_info(&smm_base, &smm_size);
+	smm_subregion(SMM_SUBREGION_HANDLER, &handler_base, &handler_size);
+
+	relo_attrs.smbase = (uint32_t)smm_base;
+	relo_attrs.tseg_base = relo_attrs.smbase;
+	relo_attrs.tseg_mask = ALIGN_DOWN(~(smm_size - 1), 128 * KiB);
+	relo_attrs.tseg_mask |= SMM_TSEG_WB;
+
+	*perm_smbase = (uintptr_t)handler_base;
+	*perm_smsize = handler_size;
+	*smm_save_state_size = sizeof(amd64_smm_state_save_area_t);
+}
+
+static void relocation_handler(int cpu, uintptr_t curr_smbase,
+				uintptr_t staggered_smbase)
+{
+	msr_t tseg_base, tseg_mask;
+	amd64_smm_state_save_area_t *smm_state;
+
+	tseg_base.lo = relo_attrs.tseg_base;
+	tseg_base.hi = 0;
+	wrmsr(SMM_ADDR_MSR, tseg_base);
+	tseg_mask.lo = relo_attrs.tseg_mask;
+	tseg_mask.hi = ((1 << (cpu_phys_address_size() - 32)) - 1);
+	wrmsr(SMM_MASK_MSR, tseg_mask);
+	smm_state = (void *)(SMM_AMD64_SAVE_STATE_OFFSET + curr_smbase);
+	smm_state->smbase = staggered_smbase;
+}
+
+static const struct mp_ops mp_ops = {
+	.pre_mp_init = pre_mp_init,
+	.get_cpu_count = get_cpu_count,
+	.get_smm_info = get_smm_info,
+	.relocation_handler = relocation_handler,
+	.post_mp_init = enable_smi_generation,
+};
+
+void stoney_init_cpus(struct device *dev)
+{
+	/* Clear for take-off */
+	if (mp_init_with_smm(dev->link_list, &mp_ops) < 0)
+		printk(BIOS_ERR, "MP initialization failure.\n");
+
+	/* The flash is now no longer cacheable. Reset to WP for performance. */
+	mtrr_use_temp_range(FLASH_BASE_ADDR, CONFIG_ROM_SIZE, MTRR_TYPE_WRPROT);
+
+	set_warm_reset_flag();
+}
+
+static void model_15_init(struct device *dev)
+{
+	check_mca();
+	setup_lapic();
+
+	/*
+	 * Per AMD, sync an undocumented MSR with the PSP base address.
+	 * Experiments showed that if you write to the MSR after it has
+	 * been previously programmed, it causes a general protection fault.
+	 * Also, the MSR survives warm reset and S3 cycles, so we need to
+	 * test if it was previously written before writing to it.
+	 */
+	msr_t psp_msr;
+	uint32_t psp_bar; /* Note: NDA BKDG names this 32-bit register BAR3 */
+	psp_bar = pci_read_config32(SOC_PSP_DEV, PCI_BASE_ADDRESS_4);
+	psp_bar &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK;
+	psp_msr = rdmsr(0xc00110a2);
+	if (psp_msr.lo == 0) {
+		psp_msr.lo = psp_bar;
+		wrmsr(0xc00110a2, psp_msr);
+	}
+}
+
+static struct device_operations cpu_dev_ops = {
+	.init = model_15_init,
+};
+
+static struct cpu_device_id cpu_table[] = {
+	{ X86_VENDOR_AMD, 0x670f00 },
+	{ 0, 0 },
+};
+
+static const struct cpu_driver model_15 __cpu_driver = {
+	.ops      = &cpu_dev_ops,
+	.id_table = cpu_table,
+};