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 * lowest area (24-bit addresses) * low area (32-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@xxxxxxxxxxxxx> --- lib/asm-generic/memory_areas.h | 11 +++++++++++ lib/arm/asm/memory_areas.h | 11 +++++++++++ lib/arm64/asm/memory_areas.h | 11 +++++++++++ lib/powerpc/asm/memory_areas.h | 11 +++++++++++ lib/ppc64/asm/memory_areas.h | 11 +++++++++++ lib/s390x/asm/memory_areas.h | 17 +++++++++++++++++ lib/x86/asm/memory_areas.h | 22 ++++++++++++++++++++++ 7 files changed, 94 insertions(+) create mode 100644 lib/asm-generic/memory_areas.h create mode 100644 lib/arm/asm/memory_areas.h create mode 100644 lib/arm64/asm/memory_areas.h create mode 100644 lib/powerpc/asm/memory_areas.h create mode 100644 lib/ppc64/asm/memory_areas.h create mode 100644 lib/s390x/asm/memory_areas.h create mode 100644 lib/x86/asm/memory_areas.h 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/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/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..d704df3 --- /dev/null +++ b/lib/x86/asm/memory_areas.h @@ -0,0 +1,22 @@ +#ifndef MEMORY_AREAS_H +#define MEMORY_AREAS_H + +#define AREA_NORMAL_PFN BIT(32-12) +#define AREA_NORMAL_NUMBER 0 +#define AREA_NORMAL 1 + +#define AREA_LOW_PFN BIT(24-12) +#define AREA_LOW_NUMBER 1 +#define AREA_LOW 2 + +#define AREA_LOWEST_PFN 0 +#define AREA_LOWEST_NUMBER 2 +#define AREA_LOWEST 4 + +#define AREA_DMA24 AREA_LOWEST +#define AREA_DMA32 (AREA_LOWEST | AREA_LOW) + +#define AREA_ANY -1 +#define AREA_ANY_NUMBER 0xff + +#endif -- 2.26.2
