[091/108] x86: apl: Generate required ACPI tables

diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile
index 1760df54d8..14e254545f 100644
--- a/arch/x86/cpu/apollolake/Makefile
+++ b/arch/x86/cpu/apollolake/Makefile
@@ -15,6 +15,7 @@  obj-y += fsp_m.o
 endif
 endif
 ifndef CONFIG_SPL_BUILD
+obj-y += acpi.o
 obj-y += fsp_s.o
 endif
 
diff --git a/arch/x86/cpu/apollolake/acpi.c b/arch/x86/cpu/apollolake/acpi.c
new file mode 100644
index 0000000000..dc8b5c6ad7
--- /dev/null
+++ b/arch/x86/cpu/apollolake/acpi.c
@@ -0,0 +1,437 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Intel Corp.
+ * Copyright (C) 2017-2019 Siemens AG
+ * (Written by Lance Zhao <lijian.zhao at intel.com> for Intel Corp.)
+ * Copyright 2019 Google LLC
+ *
+ * Modified from coreboot apollolake/acpi.c
+ */
+
+#define LOG_CATEGORY LOGC_ACPI
+
+#include <common.h>
+#include <acpigen.h>
+#include <acpi_s3.h>
+#include <cpu.h>
+#include <dm.h>
+#include <p2sb.h>
+#include <pci.h>
+#include <asm/acpi_table.h>
+#include <asm/cpu_common.h>
+#include <asm/intel_acpi.h>
+#include <asm/intel_gnvs.h>
+#include <asm/intel_pinctrl.h>
+#include <asm/intel_pinctrl_defs.h>
+#include <asm/intel_regs.h>
+#include <asm/io.h>
+#include <asm/mpspec.h>
+#include <asm/tables.h>
+#include <asm/arch/iomap.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/pm.h>
+#include <asm/arch/soc_config.h>
+#include <asm/arch/systemagent.h>
+#include <dm/acpi.h>
+#include <dm/uclass-internal.h>
+#include <power/acpi_pmc.h>
+
+#define CSTATE_RES(address_space, width, offset, address)		\
+	{								\
+	.space_id = address_space,					\
+	.bit_width = width,						\
+	.bit_offset = offset,						\
+	.addrl = address,						\
+	}
+
+static struct acpi_cstate cstate_map[] = {
+	{
+		/* C1 */
+		.ctype = 1,		/* ACPI C1 */
+		.latency = 1,
+		.power = 1000,
+		.resource = {
+			.space_id = ACPI_ADDRESS_SPACE_FIXED,
+		},
+	}, {
+		.ctype = 2,		/* ACPI C2 */
+		.latency = 50,
+		.power = 10,
+		.resource = {
+			.space_id = ACPI_ADDRESS_SPACE_IO,
+			.bit_width = 8,
+			.addrl = 0x415,
+		},
+	}, {
+		.ctype = 3,		/* ACPI C3 */
+		.latency = 150,
+		.power = 10,
+		.resource = {
+			.space_id = ACPI_ADDRESS_SPACE_IO,
+			.bit_width = 8,
+			.addrl = 0x419,
+		},
+	},
+};
+
+int arch_read_sci_irq_select(void)
+{
+	struct acpi_pmc_upriv *upriv;
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_first_device_err(UCLASS_ACPI_PMC, &dev);
+	if (ret)
+		return log_msg_ret("pmc", ret);
+	upriv = dev_get_uclass_priv(dev);
+
+	return readl(upriv->pmc_bar0 + IRQ_REG);
+}
+
+int arch_write_sci_irq_select(uint scis)
+{
+	struct acpi_pmc_upriv *upriv;
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_first_device_err(UCLASS_ACPI_PMC, &dev);
+	if (ret)
+		return log_msg_ret("pmc", ret);
+	upriv = dev_get_uclass_priv(dev);
+	writel(scis, upriv->pmc_bar0 + IRQ_REG);
+
+	return 0;
+}
+
+struct acpi_cstate *arch_get_cstate_map(size_t *entries)
+{
+	*entries = ARRAY_SIZE(cstate_map);
+	return cstate_map;
+}
+
+int acpi_create_gnvs(struct acpi_global_nvs *gnvs)
+{
+	const struct apl_config *cfg = gd->arch.soc_config;
+	struct udevice *cpu, *pinctrl;
+	uint offset;
+	int ret;
+
+	if (!cfg)
+		return log_msg_ret("cfg", -EINVAL);
+
+	/* Clear out GNV */
+	memset(gnvs, '\0', sizeof(*gnvs));
+
+	/* TODO(sjg at chromium.org): Add the console log to gnvs->cbmc */
+
+#ifdef CONFIG_CHROMEOS
+	/* Initialise Verified Boot data */
+	chromeos_init_acpi(&gnvs->chromeos);
+	gnvs->chromeos.vbt2 = ACTIVE_ECFW_RO;
+#endif
+	/* Set unknown wake source */
+	gnvs->pm1i = ~0ULL;
+
+	/* CPU core count */
+	gnvs->pcnt = 1;
+	ret = uclass_find_first_device(UCLASS_CPU, &cpu);
+	if (cpu) {
+		ret = cpu_get_count(cpu);
+		if (ret > 0)
+			gnvs->pcnt = ret;
+	}
+
+	/* Enable DPTF based on mainboard configuration */
+	gnvs->dpte = cfg->dptf_enable;
+
+	/* Assign address of PERST_0 if GPIO is defined in devicetree */
+	if (cfg->prt0_gpio != GPIO_PRT0_UDEF) {
+		ret = intel_pinctrl_get_pad(cfg->prt0_gpio, &pinctrl, &offset);
+		if (ret)
+			return log_msg_ret("prt0", ret);
+		gnvs->prt0 = intel_pinctrl_get_config_reg_addr(pinctrl, offset);
+	}
+
+	/*
+	 * Get sdcard cd GPIO portid if GPIO is defined in devicetree.
+	 * Get offset of sdcard cd pin.
+	 */
+	if (cfg->sdcard_cd_gpio) {
+		ret = intel_pinctrl_get_pad(cfg->sdcard_cd_gpio, &pinctrl,
+					    &offset);
+		if (ret)
+			return log_msg_ret("prt0", ret);
+		gnvs->scdp = p2sb_get_port_id(pinctrl);
+		gnvs->scdo = intel_pinctrl_get_acpi_pin(pinctrl, offset);
+	}
+
+	return 0;
+}
+
+uint32_t acpi_fill_soc_wake(uint32_t generic_pm1_en)
+{
+	/*
+	 * WAK_STS bit is set when the system is in one of the sleep states
+	 * (via the SLP_EN bit) and an enabled wake event occurs. Upon setting
+	 * this bit, the PMC will transition the system to the ON state and
+	 * can only be set by hardware and can only be cleared by writing a one
+	 * to this bit position.
+	 */
+	generic_pm1_en |= WAK_STS | RTC_EN | PWRBTN_EN;
+
+	return generic_pm1_en;
+}
+
+int arch_madt_sci_irq_polarity(int sci)
+{
+	return MP_IRQ_POLARITY_LOW;
+}
+
+void fill_fadt(struct acpi_fadt *fadt)
+{
+	const struct apl_config *cfg = gd->arch.soc_config;
+
+	assert(cfg);
+	fadt->pm_tmr_blk = IOMAP_ACPI_BASE + PM1_TMR;
+
+	fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
+	fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
+
+	fadt->pm_tmr_len = 4;
+	fadt->duty_width = 3;
+
+	fadt->iapc_boot_arch = ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042;
+
+	fadt->x_pm_tmr_blk.space_id = 1;
+	fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
+	fadt->x_pm_tmr_blk.addrl = IOMAP_ACPI_BASE + PM1_TMR;
+
+	if (cfg->lpss_s0ix_enable)
+		fadt->flags |= ACPI_FADT_LOW_PWR_IDLE_S0;
+}
+
+void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
+		      void *dsdt)
+{
+	const struct apl_config *cfg = gd->arch.soc_config;
+	struct acpi_table_header *header = &fadt->header;
+
+	assert(cfg);
+	acpi_fadt_common(fadt, facs, dsdt);
+	intel_acpi_fill_fadt(fadt);
+	fill_fadt(fadt);
+	header->checksum = table_compute_checksum(fadt, header->length);
+}
+
+int apl_acpi_fill_dmar(struct acpi_ctx *ctx)
+{
+	struct udevice *dev, *sa_dev;
+	u64 gfxvtbar = readq(MCHBAR_REG(GFXVTBAR)) & VTBAR_MASK;
+	u64 defvtbar = readq(MCHBAR_REG(DEFVTBAR)) & VTBAR_MASK;
+	bool gfxvten = readl(MCHBAR_REG(GFXVTBAR)) & VTBAR_ENABLED;
+	bool defvten = readl(MCHBAR_REG(DEFVTBAR)) & VTBAR_ENABLED;
+	void *tmp;
+	int ret;
+
+	uclass_find_first_device(UCLASS_VIDEO, &dev);
+	ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &sa_dev);
+	if (ret)
+		return log_msg_ret("no sa", ret);
+
+	/* IGD has to be enabled, GFXVTBAR set and enabled */
+	if (dev && device_active(dev) && gfxvtbar && gfxvten) {
+		tmp = ctx->current;
+
+		ret = acpi_create_dmar_drhd(ctx, 0, 0, gfxvtbar);
+		if (ret)
+			return log_msg_ret("drhd", ret);
+		ret = acpi_create_dmar_ds_pci(ctx, PCI_BDF(0, 2, 0));
+		if (ret)
+			return log_msg_ret("ds_pci", ret);
+		acpi_dmar_drhd_fixup(ctx, tmp);
+
+		/* Add RMRR entry */
+		tmp = ctx->current;
+		ctx->current += acpi_create_dmar_rmrr(ctx->current, 0,
+				sa_get_gsm_base(sa_dev),
+				sa_get_tolud_base(sa_dev) - 1);
+		ctx->current += acpi_create_dmar_ds_pci(ctx->current,
+							PCI_BDF(0, 2, 0));
+		acpi_dmar_rmrr_fixup(ctx, tmp);
+	}
+
+	/* DEFVTBAR has to be set and enabled */
+	if (defvtbar && defvten) {
+		struct udevice *p2sb_dev;
+		u16 ibdf, hbdf;
+		uint ioapic, hpet;
+		int ret;
+
+		tmp = ctx->current;
+		/*
+		 * P2SB may already be hidden. There's no clear rule, when.
+		 * It is needed to get bus, device and function for IOAPIC and
+		 * HPET device which is stored in P2SB device. So unhide it to
+		 * get the info and hide it again when done.
+		 *
+		 * TODO(sjg at chromium.org): p2sb_unhide() ?
+		 */
+		ret = uclass_first_device_err(UCLASS_P2SB, &p2sb_dev);
+		if (ret)
+			return log_msg_ret("p2sb", ret);
+
+		dm_pci_read_config16(p2sb_dev, PCH_P2SB_IBDF, &ibdf);
+		ioapic = PCI_TO_BDF(ibdf);
+		dm_pci_read_config16(p2sb_dev, PCH_P2SB_HBDF, &hbdf);
+		hpet = PCI_TO_BDF(hbdf);
+		/* TODO(sjg at chromium.org): p2sb_hide() ? */
+
+		acpi_create_dmar_drhd(ctx, DRHD_INCLUDE_PCI_ALL, 0, defvtbar);
+		acpi_create_dmar_ds_ioapic(ctx, 2, ioapic);
+		acpi_create_dmar_ds_msi_hpet(ctx,  0, hpet);
+		acpi_dmar_drhd_fixup(tmp, ctx->current);
+	}
+
+	return 0;
+}
+
+void soc_power_states_generation(struct acpi_ctx *ctx, int core_id,
+				 int cores_per_package)
+{
+	/* Generate P-state tables */
+	generate_p_state_entries(ctx, core_id, cores_per_package);
+
+	/* Generate T-state tables */
+	generate_t_state_entries(ctx, core_id, cores_per_package);
+}
+
+static void acpigen_soc_get_dw0_in_local5(struct acpi_ctx *ctx, ulong addr)
+{
+	/*
+	 * Store (\_SB.GPC0 (addr), Local5)
+	 * \_SB.GPC0 is used to read cfg0 value from dw0. It is defined in
+	 * gpiolib.asl.
+	 */
+	acpigen_write_store(ctx);
+	acpigen_emit_namestring(ctx, "\\_SB.GPC0");
+	acpigen_write_integer(ctx, addr);
+	acpigen_emit_byte(ctx, LOCAL5_OP);
+}
+
+static int acpigen_soc_get_gpio_val(struct acpi_ctx *ctx, uint gpio_num,
+				    uint32_t mask)
+{
+	assert(gpio_num < TOTAL_PADS);
+	struct udevice *dev;
+	uintptr_t addr;
+	uint offset;
+	int ret;
+
+	ret = intel_pinctrl_get_pad(gpio_num, &dev, &offset);
+	if (ret)
+		return log_msg_ret("pad", ret);
+	addr = intel_pinctrl_get_config_reg_addr(dev, offset);
+
+	acpigen_soc_get_dw0_in_local5(ctx, addr);
+
+	/* If (And (Local5, mask)) */
+	acpigen_write_if_and(ctx, LOCAL5_OP, mask);
+
+	/* Store (One, Local0) */
+	acpigen_write_store_ops(ctx, ONE_OP, LOCAL0_OP);
+
+	acpigen_pop_len(ctx);	/* If */
+
+	/* Else */
+	acpigen_write_else(ctx);
+
+	/* Store (Zero, Local0) */
+	acpigen_write_store_ops(ctx, ZERO_OP, LOCAL0_OP);
+
+	acpigen_pop_len(ctx);	/* Else */
+
+	return 0;
+}
+
+static int acpigen_soc_set_gpio_val(struct acpi_ctx *ctx, uint gpio_num,
+				    uint32_t val)
+{
+	assert(gpio_num < TOTAL_PADS);
+	struct udevice *dev;
+	uintptr_t addr;
+	uint offset;
+	int ret;
+
+	ret = intel_pinctrl_get_pad(gpio_num, &dev, &offset);
+	if (ret)
+		return log_msg_ret("pad", ret);
+	addr = intel_pinctrl_get_config_reg_addr(dev, offset);
+
+	acpigen_soc_get_dw0_in_local5(ctx, addr);
+
+	if (val) {
+		/* Or (Local5, PAD_CFG0_TX_STATE, Local5) */
+		acpigen_write_or(ctx, LOCAL5_OP, PAD_CFG0_TX_STATE, LOCAL5_OP);
+	} else {
+		/* Not (PAD_CFG0_TX_STATE, Local6) */
+		acpigen_write_not(ctx, PAD_CFG0_TX_STATE, LOCAL6_OP);
+
+		/* And (Local5, Local6, Local5) */
+		acpigen_write_and(ctx, LOCAL5_OP, LOCAL6_OP, LOCAL5_OP);
+	}
+
+	/*
+	 * \_SB.SPC0 (addr, Local5)
+	 * \_SB.SPC0 is used to write cfg0 value in dw0. It is defined in
+	 * gpiolib.asl.
+	 */
+	acpigen_emit_namestring(ctx, "\\_SB.SPC0");
+	acpigen_write_integer(ctx, addr);
+	acpigen_emit_byte(ctx, LOCAL5_OP);
+
+	return 0;
+}
+
+int acpigen_soc_read_rx_gpio(struct acpi_ctx *ctx, uint gpio_num)
+{
+	int ret;
+
+	ret = acpigen_soc_get_gpio_val(ctx, gpio_num, PAD_CFG0_RX_STATE);
+	if (ret)
+		return log_msg_ret("val", ret);
+
+	return 0;
+}
+
+int acpigen_soc_get_tx_gpio(struct acpi_ctx *ctx, uint gpio_num)
+{
+	int ret;
+
+	ret = acpigen_soc_get_gpio_val(ctx, gpio_num, PAD_CFG0_TX_STATE);
+	if (ret)
+		return log_msg_ret("val", ret);
+
+	return 0;
+}
+
+int acpigen_soc_set_tx_gpio(struct acpi_ctx *ctx, uint gpio_num)
+{
+	int ret;
+
+	ret = acpigen_soc_set_gpio_val(ctx, gpio_num, 1);
+	if (ret)
+		return log_msg_ret("val", ret);
+
+	return 0;
+}
+
+int acpigen_soc_clear_tx_gpio(struct acpi_ctx *ctx, uint gpio_num)
+{
+	int ret;
+
+	ret = acpigen_soc_set_gpio_val(ctx, gpio_num, 0);
+	if (ret)
+		return log_msg_ret("val", ret);
+
+	return 0;
+}
diff --git a/arch/x86/include/asm/arch-apollolake/acpi.h b/arch/x86/include/asm/arch-apollolake/acpi.h
new file mode 100644
index 0000000000..b5b9aaa2b9
--- /dev/null
+++ b/arch/x86/include/asm/arch-apollolake/acpi.h
@@ -0,0 +1,13 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#ifndef _ASM_ARCH_ACPI_H
+#define _ASM_ARCH_ACPI_H
+
+struct acpi_ctx;
+
+int apl_acpi_fill_dmar(struct acpi_ctx *ctx);
+
+#endif /* _ASM_ARCH_CPU_H */
diff --git a/include/acpi_s3.h b/include/acpi_s3.h
index baa848dcd1..847139baa0 100644
--- a/include/acpi_s3.h
+++ b/include/acpi_s3.h
@@ -28,6 +28,10 @@ 
 #define SLP_TYP_S4	6
 #define SLP_TYP_S5	7
 
+/* PM1_STS register */
+#define RTC_EN		BIT(10)
+#define PWRBTN_EN	BIT(8)
+
 /* Memory size reserved for S3 resume */
 #define S3_RESERVE_SIZE	0x1000