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-rw-r--r--include/linux/ioport.h33
-rw-r--r--include/linux/mm.h3
2 files changed, 33 insertions, 3 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 24bea087e7af..afb45597fb5f 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -20,6 +20,7 @@ struct resource {
resource_size_t end;
const char *name;
unsigned long flags;
+ unsigned long desc;
struct resource *parent, *sibling, *child;
};
@@ -49,12 +50,19 @@ struct resource {
#define IORESOURCE_WINDOW 0x00200000 /* forwarded by bridge */
#define IORESOURCE_MUXED 0x00400000 /* Resource is software muxed */
+#define IORESOURCE_EXT_TYPE_BITS 0x01000000 /* Resource extended types */
+#define IORESOURCE_SYSRAM 0x01000000 /* System RAM (modifier) */
+
#define IORESOURCE_EXCLUSIVE 0x08000000 /* Userland may not map this resource */
+
#define IORESOURCE_DISABLED 0x10000000
#define IORESOURCE_UNSET 0x20000000 /* No address assigned yet */
#define IORESOURCE_AUTO 0x40000000
#define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
+/* I/O resource extended types */
+#define IORESOURCE_SYSTEM_RAM (IORESOURCE_MEM|IORESOURCE_SYSRAM)
+
/* PnP IRQ specific bits (IORESOURCE_BITS) */
#define IORESOURCE_IRQ_HIGHEDGE (1<<0)
#define IORESOURCE_IRQ_LOWEDGE (1<<1)
@@ -105,6 +113,22 @@ struct resource {
/* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
#define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
+/*
+ * I/O Resource Descriptors
+ *
+ * Descriptors are used by walk_iomem_res_desc() and region_intersects()
+ * for searching a specific resource range in the iomem table. Assign
+ * a new descriptor when a resource range supports the search interfaces.
+ * Otherwise, resource.desc must be set to IORES_DESC_NONE (0).
+ */
+enum {
+ IORES_DESC_NONE = 0,
+ IORES_DESC_CRASH_KERNEL = 1,
+ IORES_DESC_ACPI_TABLES = 2,
+ IORES_DESC_ACPI_NV_STORAGE = 3,
+ IORES_DESC_PERSISTENT_MEMORY = 4,
+ IORES_DESC_PERSISTENT_MEMORY_LEGACY = 5,
+};
/* helpers to define resources */
#define DEFINE_RES_NAMED(_start, _size, _name, _flags) \
@@ -113,6 +137,7 @@ struct resource {
.end = (_start) + (_size) - 1, \
.name = (_name), \
.flags = (_flags), \
+ .desc = IORES_DESC_NONE, \
}
#define DEFINE_RES_IO_NAMED(_start, _size, _name) \
@@ -170,6 +195,10 @@ static inline unsigned long resource_type(const struct resource *res)
{
return res->flags & IORESOURCE_TYPE_BITS;
}
+static inline unsigned long resource_ext_type(const struct resource *res)
+{
+ return res->flags & IORESOURCE_EXT_TYPE_BITS;
+}
/* True iff r1 completely contains r2 */
static inline bool resource_contains(struct resource *r1, struct resource *r2)
{
@@ -239,8 +268,8 @@ extern int
walk_system_ram_res(u64 start, u64 end, void *arg,
int (*func)(u64, u64, void *));
extern int
-walk_iomem_res(char *name, unsigned long flags, u64 start, u64 end, void *arg,
- int (*func)(u64, u64, void *));
+walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64 end,
+ void *arg, int (*func)(u64, u64, void *));
/* True if any part of r1 overlaps r2 */
static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 516e14944339..2b6e22782699 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -387,7 +387,8 @@ enum {
REGION_MIXED,
};
-int region_intersects(resource_size_t offset, size_t size, const char *type);
+int region_intersects(resource_size_t offset, size_t size, unsigned long flags,
+ unsigned long desc);
/* Support for virtually mapped pages */
struct page *vmalloc_to_page(const void *addr);