[PATCH v2 04/20] hw/i386/pc: Add the E820Type enum type

[Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>]

This ensure we won't use an incorrect value.

Signed-off-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
---
v2: Do not cast the enum (Li)
---
 hw/i386/pc.c         |  4 ++--
 include/hw/i386/pc.h | 16 ++++++++++------
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 5a7cffbb1a..86ba554439 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -872,7 +872,7 @@ static void handle_a20_line_change(void *opaque, int irq, int level)
     x86_cpu_set_a20(cpu, level);
 }
 
-ssize_t e820_add_entry(uint64_t address, uint64_t length, uint32_t type)
+ssize_t e820_add_entry(uint64_t address, uint64_t length, E820Type type)
 {
     unsigned int index = le32_to_cpu(e820_reserve.count);
     struct e820_entry *entry;
@@ -906,7 +906,7 @@ size_t e820_get_num_entries(void)
     return e820_entries;
 }
 
-bool e820_get_entry(unsigned int idx, uint32_t type,
+bool e820_get_entry(unsigned int idx, E820Type type,
                     uint64_t *address, uint64_t *length)
 {
     if (idx < e820_entries && e820_table[idx].type == cpu_to_le32(type)) {
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index c56116e6f6..7c07185dd5 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -282,12 +282,16 @@ void pc_system_firmware_init(PCMachineState *pcms, MemoryRegion *rom_memory);
 void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
                        const CPUArchIdList *apic_ids, GArray *entry);
 
-/* e820 types */
-#define E820_RAM        1
-#define E820_RESERVED   2
-#define E820_ACPI       3
-#define E820_NVS        4
-#define E820_UNUSABLE   5
+/**
+ * E820Type: Type of the e820 address range.
+ */
+typedef enum {
+    E820_RAM        = 1,
+    E820_RESERVED   = 2,
+    E820_ACPI       = 3,
+    E820_NVS        = 4,
+    E820_UNUSABLE   = 5
+} E820Type;
 
 ssize_t e820_add_entry(uint64_t, uint64_t, uint32_t);
 size_t e820_get_num_entries(void);
-- 
2.20.1