lib/asm: Add definitions of memory areas
Add definitions and boundaries of memory areas for some architectures.
This is needed by the next patch.
Most architectures only get one generic memory area, wherease x86 and
s390x get some more attention:
x86 gets
* low area (32-bit addresses)
* high PAE area (36-bit addresses)
* the rest
s390x gets
* low area (31-bit addresses)
* the rest
Notice that the number indicates the order in which the areas are
scanned when more than one area is indicated. The default order tries
to get allocations from higher address ranges before trying lower ones.
This tries to keep the precious lower addresses as free as possible.
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-Id: <20201002154420.292134-4-imbrenda@linux.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/lib/arm/asm/memory_areas.h b/lib/arm/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/arm/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/arm64/asm/memory_areas.h b/lib/arm64/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/arm64/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/asm-generic/memory_areas.h b/lib/asm-generic/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/asm-generic/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/powerpc/asm/memory_areas.h b/lib/powerpc/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/powerpc/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/ppc64/asm/memory_areas.h b/lib/ppc64/asm/memory_areas.h
new file mode 100644
index 0000000..927baa7
--- /dev/null
+++ b/lib/ppc64/asm/memory_areas.h
@@ -0,0 +1,11 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN 0
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
diff --git a/lib/s390x/asm/memory_areas.h b/lib/s390x/asm/memory_areas.h
new file mode 100644
index 0000000..4856a27
--- /dev/null
+++ b/lib/s390x/asm/memory_areas.h
@@ -0,0 +1,17 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN BIT(31-12)
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_LOW_PFN 0
+#define AREA_LOW_NUMBER 1
+#define AREA_LOW 2
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#define AREA_DMA31 AREA_LOW
+
+#endif
diff --git a/lib/x86/asm/memory_areas.h b/lib/x86/asm/memory_areas.h
new file mode 100644
index 0000000..952f5bd
--- /dev/null
+++ b/lib/x86/asm/memory_areas.h
@@ -0,0 +1,21 @@
+#ifndef MEMORY_AREAS_H
+#define MEMORY_AREAS_H
+
+#define AREA_NORMAL_PFN BIT(36-12)
+#define AREA_NORMAL_NUMBER 0
+#define AREA_NORMAL 1
+
+#define AREA_PAE_HIGH_PFN BIT(32-12)
+#define AREA_PAE_HIGH_NUMBER 1
+#define AREA_PAE_HIGH 2
+
+#define AREA_LOW_PFN 0
+#define AREA_LOW_NUMBER 2
+#define AREA_LOW 4
+
+#define AREA_PAE (AREA_PAE | AREA_LOW)
+
+#define AREA_ANY -1
+#define AREA_ANY_NUMBER 0xff
+
+#endif
