qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH v4 06/20] hw/arm/virt-acpi-build: Generation of DSDT


From: Shannon Zhao
Subject: [Qemu-devel] [PATCH v4 06/20] hw/arm/virt-acpi-build: Generation of DSDT table for virt devices
Date: Fri, 3 Apr 2015 18:03:38 +0800

From: Shannon Zhao <address@hidden>

DSDT consists of the usual common table header plus a definition
block in AML encoding which describes all devices in the platform.

After initializing DSDT with header information the namespace is
created which is followed by the device encodings. The devices are
described using the Resource Template for the 32-Bit Fixed Memory
Range and the Extended Interrupt Descriptors.

Signed-off-by: Shannon Zhao <address@hidden>
Signed-off-by: Shannon Zhao <address@hidden>
---
 hw/arm/virt-acpi-build.c | 137 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index 388838a..516c1d0 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -57,6 +57,139 @@
 #define ACPI_BUILD_DPRINTF(fmt, ...)
 #endif
 
+static void acpi_dsdt_add_cpus(Aml *scope, int max_cpus)
+{
+    Aml *dev, *crs;
+    int i;
+    char name[5];
+    for (i = 0; i < max_cpus; i++) {
+        snprintf(name, 5, "CPU%u", i);
+        dev = aml_device("%s", name);
+        aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
+        aml_append(dev, aml_name_decl("_UID", aml_int(i)));
+        crs = aml_resource_template();
+        aml_append(dev, aml_name_decl("_CRS", crs));
+        aml_append(scope, dev);
+    }
+}
+
+static void acpi_dsdt_add_uart(Aml *scope, const hwaddr *uart_addr,
+                                           const int *uart_irq)
+{
+    Aml *dev, *crs;
+
+    dev = aml_device("COM0");
+    aml_append(dev, aml_name_decl("_HID", aml_string("ARMH0011")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+
+    crs = aml_resource_template();
+    aml_append(crs,
+               aml_memory32_fixed(uart_addr[0], uart_addr[1], 0x01));
+    aml_append(crs,
+               aml_interrupt(0x01, *uart_irq + 32));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+
+static void acpi_dsdt_add_rtc(Aml *scope, const hwaddr *rtc_addr,
+                                          const int *rtc_irq)
+{
+    Aml *dev, *crs;
+
+    dev = aml_device("RTC0");
+    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0013")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+
+    crs = aml_resource_template();
+    aml_append(crs,
+               aml_memory32_fixed(rtc_addr[0], rtc_addr[1], 0x01));
+    aml_append(crs,
+               aml_interrupt(0x01, *rtc_irq + 32));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+
+static void acpi_dsdt_add_flash(Aml *scope, const hwaddr *flash_addr)
+{
+    Aml *dev, *crs;
+    hwaddr base = flash_addr[0];
+    hwaddr size = flash_addr[1];
+
+    dev = aml_device("FLS0");
+    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0015")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+
+    crs = aml_resource_template();
+    aml_append(crs,
+               aml_memory32_fixed(base, size, 0x01));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+
+    dev = aml_device("FLS1");
+    aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0015")));
+    aml_append(dev, aml_name_decl("_UID", aml_int(1)));
+    crs = aml_resource_template();
+    aml_append(crs,
+               aml_memory32_fixed(base + size, size, 0x01));
+    aml_append(dev, aml_name_decl("_CRS", crs));
+    aml_append(scope, dev);
+}
+
+static void acpi_dsdt_add_virtio(Aml *scope, const hwaddr *mmio_addrs,
+                                             const int *mmio_irq, int num)
+{
+    Aml *dev, *crs;
+    hwaddr base = mmio_addrs[0];
+    hwaddr size = mmio_addrs[1];
+    int irq = *mmio_irq + 32;
+    int i;
+    char name[5];
+
+    for (i = 0; i < num; i++) {
+        snprintf(name, 5, "VR%02u", i);
+        dev = aml_device("%s", name);
+        aml_append(dev, aml_name_decl("_HID", aml_string("LNRO0005")));
+        aml_append(dev, aml_name_decl("_UID", aml_int(i)));
+
+        crs = aml_resource_template();
+        aml_append(crs,
+                   aml_memory32_fixed(base, size, 0x01));
+        aml_append(crs,
+                   aml_interrupt(0x01, irq + i));
+        aml_append(dev, aml_name_decl("_CRS", crs));
+        aml_append(scope, dev);
+        base += size;
+    }
+}
+
+/* DSDT */
+static void
+build_dsdt(GArray *table_data, GArray *linker, VirtGuestInfo *guest_info)
+{
+    Aml *scope, *dsdt;
+    acpi_dsdt_info *info = guest_info->dsdt_info;
+
+    dsdt = init_aml_allocator();
+    /* Reserve space for header */
+    acpi_data_push(dsdt->buf, sizeof(AcpiTableHeader));
+
+    scope = aml_scope("\\_SB");
+    acpi_dsdt_add_cpus(scope, guest_info->max_cpus);
+    acpi_dsdt_add_uart(scope, info->uart_addr, info->uart_irq);
+    acpi_dsdt_add_rtc(scope, info->rtc_addr, info->rtc_irq);
+    acpi_dsdt_add_flash(scope, info->flash_addr);
+    acpi_dsdt_add_virtio(scope, info->virtio_mmio_addr,
+             info->virtio_mmio_irq, info->virtio_mmio_num);
+
+    aml_append(dsdt, scope);
+    /* copy AML table into ACPI tables blob and patch header there */
+    g_array_append_vals(table_data, dsdt->buf->data, dsdt->buf->len);
+    build_header(linker, table_data,
+        (void *)(table_data->data + table_data->len - dsdt->buf->len),
+        "DSDT", dsdt->buf->len, 1);
+    free_aml_allocator();
+}
+
 typedef
 struct AcpiBuildState {
     /* Copy of table in RAM (for patching). */
@@ -72,6 +205,7 @@ static
 void virt_acpi_build(VirtGuestInfo *guest_info, AcpiBuildTables *tables)
 {
     GArray *table_offsets;
+    GArray *tables_blob = tables->table_data;
 
     table_offsets = g_array_new(false, true /* clear */,
                                         sizeof(uint32_t));
@@ -89,6 +223,9 @@ void virt_acpi_build(VirtGuestInfo *guest_info, 
AcpiBuildTables *tables)
      * DSDT
      */
 
+    /* DSDT is pointed to by FADT */
+    build_dsdt(tables_blob, tables->linker, guest_info);
+
     /* Cleanup memory that's no longer used. */
     g_array_free(table_offsets, true);
 }
-- 
2.0.4





reply via email to

[Prev in Thread] Current Thread [Next in Thread]