[SeaBIOS] [PATCH v2 3/4] paravirt: use define for 4G memory boundary

[John Levon]

Signed-off-by: John Levon 
---
 src/fw/paravirt.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/fw/paravirt.c b/src/fw/paravirt.c
index 0ff5d0a4..3ad9094b 100644
--- a/src/fw/paravirt.c
+++ b/src/fw/paravirt.c
@@ -28,6 +28,8 @@
 #include "xen.h" // xen_biostable_setup
 #include "stacks.h" // yield

+#define MEM_4G (0x100000000ULL)
+
 // Amount of continuous ram under 4Gig
 u32 RamSize;
 // Amount of continuous ram >4Gig
@@ -589,7 +591,7 @@ qemu_cfg_e820(void)
                 | ((u32)rtc_read(CMOS_MEM_HIGHMEM_MID) << 24)
                 | ((u64)rtc_read(CMOS_MEM_HIGHMEM_HIGH) << 32));
     RamSizeOver4G = high;
-    e820_add(0x100000000ull, high, E820_RAM);
+    e820_add(MEM_4G, high, E820_RAM);
     dprintf(1, "RamSizeOver4G: 0x%016llx [cmos]\n", RamSizeOver4G);
 }

@@ -772,14 +774,14 @@ static int qemu_early_e820(void)
             e820_add(table.address, table.length, table.type);
             dprintf(1, "qemu/e820: addr 0x%016llx len 0x%016llx [RAM]\n",
                     table.address, table.length);
-            if (table.address < 0x100000000LL) {
+            if (table.address < MEM_4G) {
                 // below 4g
                 if (RamSize < table.address + table.length)
                     RamSize = table.address + table.length;
             } else {
                 // above 4g
-                if (RamSizeOver4G < table.address + table.length - 0x100000000LL)
-                    RamSizeOver4G = table.address + table.length - 0x100000000LL;
+                if (RamSizeOver4G < table.address + table.length - MEM_4G)
+                    RamSizeOver4G = table.address + table.length - MEM_4G;
             }
         }
     }