build e820 entries for low RAM
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/main.c b/main.c
index de2a2ee..8b61caf 100644
--- a/main.c
+++ b/main.c
@@ -88,9 +88,19 @@
panic();
size = fw_cfg_file_size(id);
- e820.nr_map = size / sizeof(e820.map[0]);
+ e820.nr_map = size / sizeof(e820.map[0]) + 4;
fw_cfg_file_select(id);
- fw_cfg_read(&e820.map, size);
+ e820.map[0] = (struct e820entry)
+ { .addr = 0, .size = 639 * 1024, .type = E820_RAM }; /* low RAM */
+ e820.map[1] = (struct e820entry)
+ { .addr = 639 * 1024, .size = 1024, .type = E820_RESERVED }; /* EBDA */
+ e820.map[2] = (struct e820entry)
+ { .addr = 0xe0000, .size = 64 * 1024, .type = E820_NVS }; /* ACPI tables */
+ e820.map[3] = (struct e820entry)
+ { .addr = 0xf0000, .size = 64 * 1024, .type = E820_RESERVED }; /* firmware */
+ fw_cfg_read(&e820.map[4], size);
+ e820.map[4].addr = 1024 * 1024;
+ e820.map[4].size -= 1024 * 1024;
}
int main(void)
