[PULL,06/17] hw/loongarch: Init efi_boot_memmap table

Commit Message

gaosong April 28, 2024, 8:51 a.m. UTC

The efi_system_table adds a efi_boot_memmap configuration table.

Signed-off-by: Song Gao <[e-mail]>
Reviewed-by: Bibo Mao <[e-mail]>
Message-Id: <[e-mail]>
---
 hw/loongarch/boot.c         | 40 +++++++++++++++++++++++++++++++++++++
 hw/loongarch/virt.c         | 11 ++--------
 include/hw/loongarch/boot.h | 27 +++++++++++++++++++++++++
 include/hw/loongarch/virt.h | 10 ++++++++++
 4 files changed, 79 insertions(+), 9 deletions(-)

Patch

diff --git a/hw/loongarch/boot.c b/hw/loongarch/boot.c
index 46a241a04c..18aae3434d 100644
--- a/hw/loongarch/boot.c
+++ b/hw/loongarch/boot.c
@@ -63,8 +63,41 @@  static const unsigned int slave_boot_code[] = {
     0x4c000020,   /* jirl       $zero, $ra,0                   */
 };
 
+static inline void *guidcpy(void *dst, const void *src)
+{
+    return memcpy(dst, src, sizeof(efi_guid_t));
+}
+
+static void init_efi_boot_memmap(struct efi_system_table *systab,
+                                 void *p, void *start)
+{
+    unsigned i;
+    struct efi_boot_memmap *boot_memmap = p;
+    efi_guid_t tbl_guid = LINUX_EFI_BOOT_MEMMAP_GUID;
+
+    /* efi_configuration_table 1 */
+    guidcpy(&systab->tables[0].guid, &tbl_guid);
+    systab->tables[0].table = (struct efi_configuration_table *)(p - start);
+    systab->nr_tables = 1;
+
+    boot_memmap->desc_size = sizeof(efi_memory_desc_t);
+    boot_memmap->desc_ver = 1;
+    boot_memmap->map_size = 0;
+
+    efi_memory_desc_t *map = p + sizeof(struct efi_boot_memmap);
+    for (i = 0; i < memmap_entries; i++) {
+        map = (void *)boot_memmap + sizeof(*map);
+        map[i].type = memmap_table[i].type;
+        map[i].phys_addr = ROUND_UP(memmap_table[i].address, 64 * KiB);
+        map[i].num_pages = ROUND_DOWN(memmap_table[i].address +
+                        memmap_table[i].length - map[i].phys_addr, 64 * KiB);
+        p += sizeof(efi_memory_desc_t);
+    }
+}
+
 static void init_systab(struct loongarch_boot_info *info, void *p, void *start)
 {
+    void *bp_tables_start;
     struct efi_system_table *systab = p;
 
     info->a2 = (uint64_t)p - (uint64_t)start;
@@ -80,6 +113,13 @@  static void init_systab(struct loongarch_boot_info *info, void *p, void *start)
     p += ROUND_UP(sizeof(struct efi_system_table), 64 * KiB);
 
     systab->tables = p;
+    bp_tables_start = p;
+
+    init_efi_boot_memmap(systab, p, start);
+    p += ROUND_UP(sizeof(struct efi_boot_memmap) +
+                  sizeof(efi_memory_desc_t) * memmap_entries, 64 * KiB);
+
+    systab->tables = (struct efi_configuration_table *)(bp_tables_start - start);
 }
 
 static void init_cmdline(struct loongarch_boot_info *info, void *p, void *start)
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index bfb88aedab..708aa8bc60 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -378,15 +378,8 @@  static void virt_powerdown_req(Notifier *notifier, void *opaque)
     acpi_send_event(s->acpi_ged, ACPI_POWER_DOWN_STATUS);
 }
 
-struct memmap_entry {
-    uint64_t address;
-    uint64_t length;
-    uint32_t type;
-    uint32_t reserved;
-};
-
-static struct memmap_entry *memmap_table;
-static unsigned memmap_entries;
+struct memmap_entry *memmap_table;
+unsigned memmap_entries;
 
 static void memmap_add_entry(uint64_t address, uint64_t length, uint32_t type)
 {
diff --git a/include/hw/loongarch/boot.h b/include/hw/loongarch/boot.h
index cf0e4d4f91..76622af2e2 100644
--- a/include/hw/loongarch/boot.h
+++ b/include/hw/loongarch/boot.h
@@ -21,6 +21,15 @@  typedef struct {
     uint8_t b[16];
 } efi_guid_t QEMU_ALIGNED(8);
 
+#define EFI_GUID(a, b, c, d...) (efi_guid_t){ {                                \
+        (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, ((a) >> 24) & 0xff, \
+        (b) & 0xff, ((b) >> 8) & 0xff,                                         \
+        (c) & 0xff, ((c) >> 8) & 0xff, d } }
+
+#define LINUX_EFI_BOOT_MEMMAP_GUID \
+        EFI_GUID(0x800f683f, 0xd08b, 0x423a,  0xa2, 0x93, \
+                 0x96, 0x5c, 0x3c, 0x6f, 0xe2, 0xb4)
+
 struct efi_config_table {
     efi_guid_t guid;
     uint64_t *ptr;
@@ -56,6 +65,24 @@  struct efi_system_table {
     struct efi_configuration_table *tables;
 };
 
+typedef struct {
+    uint32_t type;
+    uint32_t pad;
+    uint64_t phys_addr;
+    uint64_t virt_addr;
+    uint64_t num_pages;
+    uint64_t attribute;
+} efi_memory_desc_t;
+
+struct efi_boot_memmap {
+    uint64_t map_size;
+    uint64_t desc_size;
+    uint32_t desc_ver;
+    uint64_t map_key;
+    uint64_t buff_size;
+    efi_memory_desc_t map[32];
+};
+
 struct loongarch_boot_info {
     uint64_t ram_size;
     const char *kernel_filename;
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index d7a074d69f..8a9fe4053d 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -35,6 +35,16 @@ 
 
 #define COMMAND_LINE_SIZE       512
 
+extern struct memmap_entry *memmap_table;
+extern unsigned memmap_entries;
+
+struct memmap_entry {
+    uint64_t address;
+    uint64_t length;
+    uint32_t type;
+    uint32_t reserved;
+};
+
 struct LoongArchMachineState {
     /*< private >*/
     MachineState parent_obj;