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From d659d62b9c094acea66f6f7506877f210a9dd182 Mon Sep 17 00:00:00 2001
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From: Andrea Arcangeli <aarcange@redhat.com>
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Date: Tue, 8 Oct 2013 17:07:23 +0200
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Subject: allow >1TB of RAM
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Andrea Arcangeli <aarcange@redhat.com>
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Message-id: <1381252043-13480-2-git-send-email-aarcange@redhat.com>
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Patchwork-id: 54785
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O-Subject: [RHEL-7.0 seabios PATCH] allow >1TB of RAM
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Bugzilla: 1016974
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Gleb Natapov <gleb@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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Receive bits 40-48 from qemu to setup e820 maps with more than 1TB of ram.
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Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
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---
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 src/cmos.h | 7 ++++---
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 src/post.c | 7 ++++---
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 2 files changed, 8 insertions(+), 6 deletions(-)
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(cherry picked from commit 0dea1df1f9b9a64bd9e71dd1a7b4c6cc9962afa0)
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Signed-off-by: Paweł Poławski <ppolawsk@redhat.com>
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---
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 src/fw/paravirt.c | 7 ++++---
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 src/hw/rtc.h      | 7 ++++---
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 2 files changed, 8 insertions(+), 6 deletions(-)
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diff --git a/src/fw/paravirt.c b/src/fw/paravirt.c
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index fba4e52d..090d6555 100644
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--- a/src/fw/paravirt.c
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+++ b/src/fw/paravirt.c
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@@ -516,9 +516,10 @@ qemu_cfg_e820(void)
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     }
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     // Check for memory over 4Gig in cmos
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-    u64 high = ((rtc_read(CMOS_MEM_HIGHMEM_LOW) << 16)
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-                | ((u32)rtc_read(CMOS_MEM_HIGHMEM_MID) << 24)
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-                | ((u64)rtc_read(CMOS_MEM_HIGHMEM_HIGH) << 32));
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+    u64 high = ((rtc_read(CMOS_MEM_HIGHMEM_16) << 16)
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+                | ((u32)rtc_read(CMOS_MEM_HIGHMEM_24) << 24)
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+                | ((u64)rtc_read(CMOS_MEM_HIGHMEM_32) << 32)
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+                | ((u64)rtc_read(CMOS_MEM_HIGHMEM_40) << 40));
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     RamSizeOver4G = high;
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     e820_add(0x100000000ull, high, E820_RAM);
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     dprintf(1, "RamSizeOver4G: 0x%016llx [cmos]\n", RamSizeOver4G);
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diff --git a/src/hw/rtc.h b/src/hw/rtc.h
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index 252e73a4..c4369f81 100644
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--- a/src/hw/rtc.h
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+++ b/src/hw/rtc.h
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@@ -41,9 +41,10 @@
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 #define CMOS_BIOS_BOOTFLAG1      0x38
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 #define CMOS_BIOS_DISKTRANSFLAG  0x39
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 #define CMOS_BIOS_BOOTFLAG2      0x3d
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-#define CMOS_MEM_HIGHMEM_LOW     0x5b
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-#define CMOS_MEM_HIGHMEM_MID     0x5c
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-#define CMOS_MEM_HIGHMEM_HIGH    0x5d
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+#define CMOS_MEM_HIGHMEM_16      0x5b
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+#define CMOS_MEM_HIGHMEM_24      0x5c
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+#define CMOS_MEM_HIGHMEM_32      0x5d
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+#define CMOS_MEM_HIGHMEM_40      0x5e
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 #define CMOS_BIOS_SMP_COUNT      0x5f
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 // RTC register flags
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-- 
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2.31.1
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