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ArmVirtPkg: ArmVirtPlatformLib: find the lowest memory node 

While QEMU NUMA support on ARM will introduce more than one /memory node
in the device tree, it needs to find the lowest one and set
PcdSystemMemorySize with the actual size of this memory node.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19123 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Shannon Zhao 2015-12-04 16:17:12 +00:00 committed by lersek
parent 17247f53d5
commit 45f9bb91b0
1 changed files with 17 additions and 13 deletions
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30
ArmVirtPkg/Library/ArmVirtPlatformLib/Virt.c
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@ -72,8 +72,8 @@ ArmPlatformInitializeSystemMemory (
{
VOID *DeviceTreeBase;
INT32 Node, Prev;
UINT64 NewBase;
UINT64 NewSize;
UINT64 NewBase, CurBase;
UINT64 NewSize, CurSize;
CONST CHAR8 *Type;
INT32 Len;
CONST UINT64 *RegProp;
@ -90,7 +90,7 @@ ArmPlatformInitializeSystemMemory (
ASSERT (fdt_check_header (DeviceTreeBase) == 0);
//
// Look for a memory node
// Look for the lowest memory node
//
for (Prev = 0;; Prev = Node) {
Node = fdt_next_node (DeviceTreeBase, Prev, NULL);
@ -110,25 +110,29 @@ ArmPlatformInitializeSystemMemory (
RegProp = fdt_getprop (DeviceTreeBase, Node, "reg", &Len);
if (RegProp != 0 && Len == (2 * sizeof (UINT64))) {
NewBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
NewSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
//
// Make sure the start of DRAM matches our expectation
//
ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) == NewBase);
PcdSet64 (PcdSystemMemorySize, NewSize);
CurBase = fdt64_to_cpu (ReadUnaligned64 (RegProp));
CurSize = fdt64_to_cpu (ReadUnaligned64 (RegProp + 1));
DEBUG ((EFI_D_INFO, "%a: System RAM @ 0x%lx - 0x%lx\n",
__FUNCTION__, NewBase, NewBase + NewSize - 1));
__FUNCTION__, CurBase, CurBase + CurSize - 1));
if (NewBase > CurBase || NewBase == 0) {
NewBase = CurBase;
NewSize = CurSize;
}
} else {
DEBUG ((EFI_D_ERROR, "%a: Failed to parse FDT memory node\n",
__FUNCTION__));
}
break;
}
}
//
// Make sure the start of DRAM matches our expectation
//
ASSERT (FixedPcdGet64 (PcdSystemMemoryBase) == NewBase);
PcdSet64 (PcdSystemMemorySize, NewSize);
//
// We need to make sure that the machine we are running on has at least
// 128 MB of memory configured, and is currently executing this binary from