[U-Boot] [UBOOT PATCH v4 2/3] x86: Add ACPI table support to QEMU

[Saket Sinha]

This patch mainly adds ACPI support to QEMU.
Verified by booting Linux kernel on QEMU i440FX and Q35.

Signed-off-by: Saket Sinha <saket.sinha89 at gmail.com>
---

 arch/x86/cpu/qemu/Makefile |   1 +
 arch/x86/cpu/qemu/acpi.c   | 161 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 162 insertions(+)
 create mode 100644 arch/x86/cpu/qemu/acpi.c

diff --git a/arch/x86/cpu/qemu/Makefile b/arch/x86/cpu/qemu/Makefile
index 9a66b16..8c3884c 100644
--- a/arch/x86/cpu/qemu/Makefile
+++ b/arch/x86/cpu/qemu/Makefile
@@ -8,4 +8,5 @@ ifndef CONFIG_EFI_STUB
 obj-y += car.o dram.o
 endif
 obj-y += qemu.o
+obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi.o
 obj-$(CONFIG_PCI) += pci.o
diff --git a/arch/x86/cpu/qemu/acpi.c b/arch/x86/cpu/qemu/acpi.c
new file mode 100644
index 0000000..24da586
--- /dev/null
+++ b/arch/x86/cpu/qemu/acpi.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2015, Saket Sinha <saket.sinha89 at gmail.com>
+ *
+ * SPDX-License-Identifier:   GPL-2.0+
+ */
+
+#include <asm/acpi_table.h>
+#include <asm/ioapic.h>
+#include <asm/tables.h>
+
+void acpi_create_fadt(struct acpi_fadt *fadt, struct acpi_facs *facs,
+		void *dsdt)
+{
+	acpi_header_t *header = &(fadt->header);
+	u16 pmbase;
+
+	pci_dev_t bdf = PCI_BDF(0, 0x1f, 0);
+	pci_read_config_word(bdf, 0x40, &pmbase);
+
+     /*TODO: wrong value of pmbase by above function.
+	  Harcoding it to correct value. Since no PCI register
+	  is programmed Power Management Interface is not working*/
+	pmbase = 0x0600;
+
+	memset((void *)fadt, 0, sizeof(struct acpi_fadt));
+	memcpy(header->signature, "FACP", 4);
+	header->length = sizeof(struct acpi_fadt);
+	header->revision = 3;
+	memcpy(header->oem_id, OEM_ID, 6);
+	memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
+	memcpy(header->asl_compiler_id, ASLC, 4);
+	header->asl_compiler_revision = 0;
+
+	fadt->firmware_ctrl = (unsigned long) facs;
+	fadt->dsdt = (unsigned long) dsdt;
+	fadt->model = 0x00;
+	fadt->preferred_pm_profile = PM_MOBILE;
+	fadt->sci_int = 0x9;
+	fadt->smi_cmd = 0;
+	fadt->acpi_enable = 0;
+	fadt->acpi_disable = 0;
+	fadt->s4bios_req = 0x0;
+	fadt->pstate_cnt = 0;
+	fadt->pm1a_evt_blk = pmbase;
+	fadt->pm1b_evt_blk = 0x0;
+	fadt->pm1a_cnt_blk = pmbase + 0x4;
+	fadt->pm1b_cnt_blk = 0x0;
+	fadt->pm2_cnt_blk = pmbase + 0x50;
+	fadt->pm_tmr_blk = pmbase + 0x8;
+	fadt->gpe0_blk = pmbase + 0x20;
+	fadt->gpe1_blk = 0;
+	fadt->pm1_evt_len = 4;
+	fadt->pm1_cnt_len = 2; /* Upper word is reserved and
+				  Linux complains about 32 bit. */
+	fadt->pm2_cnt_len = 1;
+	fadt->pm_tmr_len = 4;
+	fadt->gpe0_blk_len = 16;
+	fadt->gpe1_blk_len = 0;
+	fadt->gpe1_base = 0;
+	fadt->cst_cnt = 0;
+	fadt->p_lvl2_lat = 1;
+	fadt->p_lvl3_lat = 0x39;
+	fadt->flush_size = 0;
+	fadt->flush_stride = 0;
+	fadt->duty_offset = 1;
+	fadt->duty_width = 3;
+	fadt->day_alrm = 0xd;
+	fadt->mon_alrm = 0x00;
+	fadt->century = 0x32;
+	fadt->iapc_boot_arch = 0x00;
+	fadt->flags = ACPI_FADT_WBINVD | ACPI_FADT_C1_SUPPORTED |
+			ACPI_FADT_SLEEP_BUTTON | ACPI_FADT_S4_RTC_WAKE |
+			ACPI_FADT_DOCKING_SUPPORTED | ACPI_FADT_RESET_REGISTER |
+			ACPI_FADT_PLATFORM_CLOCK;
+	fadt->reset_reg.space_id = ACPI_ADDRESS_SPACE_IO;
+	fadt->reset_reg.bit_width = 8;
+	fadt->reset_reg.bit_offset = 0;
+	fadt->reset_reg.resv = 0;
+	fadt->reset_reg.addrl = 0xcf9;
+	fadt->reset_reg.addrh = 0;
+	fadt->reset_value = 0x06;
+	fadt->x_firmware_ctl_l = 0; /* Set X_FIRMWARE_CTRL only if FACS is */
+	fadt->x_firmware_ctl_h = 0; /* above 4GB. If X_FIRMWARE_CTRL is set, */
+				    /* then FIRMWARE_CTRL must be zero. */
+
+	fadt->x_dsdt_l = (unsigned long)dsdt;
+	fadt->x_dsdt_h = 0;
+	fadt->x_pm1a_evt_blk.space_id = 1;
+	fadt->x_pm1a_evt_blk.bit_width = 32;
+	fadt->x_pm1a_evt_blk.bit_offset = 0;
+	fadt->x_pm1a_evt_blk.resv = 0;
+	fadt->x_pm1a_evt_blk.addrl = pmbase;
+	fadt->x_pm1a_evt_blk.addrh = 0x0;
+	fadt->x_pm1b_evt_blk.space_id = 0;
+	fadt->x_pm1b_evt_blk.bit_width = 0;
+	fadt->x_pm1b_evt_blk.bit_offset = 0;
+	fadt->x_pm1b_evt_blk.resv = 0;
+	fadt->x_pm1b_evt_blk.addrl = 0x0;
+	fadt->x_pm1b_evt_blk.addrh = 0x0;
+	fadt->x_pm1a_cnt_blk.space_id = 1;
+	fadt->x_pm1a_cnt_blk.bit_width = 16; /* Upper word is reserved and
+						Linux complains about 32 bit. */
+	fadt->x_pm1a_cnt_blk.bit_offset = 0;
+	fadt->x_pm1a_cnt_blk.resv = 0;
+	fadt->x_pm1a_cnt_blk.addrl = pmbase + 0x4;
+	fadt->x_pm1a_cnt_blk.addrh = 0x0;
+	fadt->x_pm1b_cnt_blk.space_id = 0;
+	fadt->x_pm1b_cnt_blk.bit_width = 0;
+	fadt->x_pm1b_cnt_blk.bit_offset = 0;
+	fadt->x_pm1b_cnt_blk.resv = 0;
+	fadt->x_pm1b_cnt_blk.addrl = 0x0;
+	fadt->x_pm1b_cnt_blk.addrh = 0x0;
+	fadt->x_pm2_cnt_blk.space_id = 1;
+	fadt->x_pm2_cnt_blk.bit_width = 8;
+	fadt->x_pm2_cnt_blk.bit_offset = 0;
+	fadt->x_pm2_cnt_blk.resv = 0;
+	fadt->x_pm2_cnt_blk.addrl = pmbase + 0x50;
+	fadt->x_pm2_cnt_blk.addrh = 0x0;
+	fadt->x_pm_tmr_blk.space_id = 1;
+	fadt->x_pm_tmr_blk.bit_width = 32;
+	fadt->x_pm_tmr_blk.bit_offset = 0;
+	fadt->x_pm_tmr_blk.resv = 0;
+	fadt->x_pm_tmr_blk.addrl = pmbase + 0x8;
+	fadt->x_pm_tmr_blk.addrh = 0x0;
+	fadt->x_gpe0_blk.space_id = 1;
+	fadt->x_gpe0_blk.bit_width = 128;
+	fadt->x_gpe0_blk.bit_offset = 0;
+	fadt->x_gpe0_blk.resv = 0;
+	fadt->x_gpe0_blk.addrl = pmbase + 0x20;
+	fadt->x_gpe0_blk.addrh = 0x0;
+	fadt->x_gpe1_blk.space_id = 0;
+	fadt->x_gpe1_blk.bit_width = 0;
+	fadt->x_gpe1_blk.bit_offset = 0;
+	fadt->x_gpe1_blk.resv = 0;
+	fadt->x_gpe1_blk.addrl = 0x0;
+	fadt->x_gpe1_blk.addrh = 0x0;
+
+	header->checksum =
+	    table_compute_checksum((void *)fadt, header->length);
+}
+
+unsigned long acpi_fill_madt(unsigned long current)
+{
+	/* create all subtables for processors */
+	current = acpi_create_madt_lapics(current);
+
+	/*TODO: get these IRQ values from device tree */
+	current += acpi_create_madt_ioapic
+		((struct acpi_madt_ioapic *)current, 2, IO_APIC_ADDR, 0);
+	current += acpi_create_madt_irqoverride
+		((struct acpi_madt_irqoverride *)current, 0, 0, 2, 0);
+	current += acpi_create_madt_irqoverride
+		((struct acpi_madt_irqoverride *)current, 0, 9, 9, 0xD);
+	current += acpi_create_madt_irqoverride
+		((struct acpi_madt_irqoverride *)current, 0, 0xB, 0xB, 0xD);
+	acpi_create_madt_lapic_nmi
+		((struct acpi_madt_lapic_nmi *)current, 0, 0, 0);
+
+	return current;
+}
+
-- 
2.1.4