diff options
Diffstat (limited to 'arch/powerpc/include/asm/io.h')
| -rw-r--r-- | arch/powerpc/include/asm/io.h | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h index 3ef40b703c4a..7f19fbd3ba55 100644 --- a/arch/powerpc/include/asm/io.h +++ b/arch/powerpc/include/asm/io.h @@ -29,12 +29,14 @@ extern struct pci_dev *isa_bridge_pcidev; #include <linux/device.h> #include <linux/compiler.h> +#include <linux/mm.h> #include <asm/page.h> #include <asm/byteorder.h> #include <asm/synch.h> #include <asm/delay.h> #include <asm/mmu.h> #include <asm/ppc_asm.h> +#include <asm/pgtable.h> #ifdef CONFIG_PPC64 #include <asm/paca.h> @@ -268,19 +270,13 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src, * their hooks, a bitfield is reserved for use by the platform near the * top of MMIO addresses (not PIO, those have to cope the hard way). * - * This bit field is 12 bits and is at the top of the IO virtual - * addresses PCI_IO_INDIRECT_TOKEN_MASK. + * The highest address in the kernel virtual space are: * - * The kernel virtual space is thus: + * d0003fffffffffff # with Hash MMU + * c00fffffffffffff # with Radix MMU * - * 0xD000000000000000 : vmalloc - * 0xD000080000000000 : PCI PHB IO space - * 0xD000080080000000 : ioremap - * 0xD0000fffffffffff : end of ioremap region - * - * Since the top 4 bits are reserved as the region ID, we use thus - * the next 12 bits and keep 4 bits available for the future if the - * virtual address space is ever to be extended. + * The top 4 bits are reserved as the region ID on hash, leaving us 8 bits + * that can be used for the field. * * The direct IO mapping operations will then mask off those bits * before doing the actual access, though that only happen when @@ -292,8 +288,8 @@ extern void _memcpy_toio(volatile void __iomem *dest, const void *src, */ #ifdef CONFIG_PPC_INDIRECT_MMIO -#define PCI_IO_IND_TOKEN_MASK 0x0fff000000000000ul -#define PCI_IO_IND_TOKEN_SHIFT 48 +#define PCI_IO_IND_TOKEN_SHIFT 52 +#define PCI_IO_IND_TOKEN_MASK (0xfful << PCI_IO_IND_TOKEN_SHIFT) #define PCI_FIX_ADDR(addr) \ ((PCI_IO_ADDR)(((unsigned long)(addr)) & ~PCI_IO_IND_TOKEN_MASK)) #define PCI_GET_ADDR_TOKEN(addr) \ @@ -810,6 +806,8 @@ extern void __iounmap_at(void *ea, unsigned long size); */ static inline unsigned long virt_to_phys(volatile void * address) { + WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !virt_addr_valid(address)); + return __pa((unsigned long)address); } @@ -833,7 +831,14 @@ static inline void * phys_to_virt(unsigned long address) /* * Change "struct page" to physical address. */ -#define page_to_phys(page) ((phys_addr_t)page_to_pfn(page) << PAGE_SHIFT) +static inline phys_addr_t page_to_phys(struct page *page) +{ + unsigned long pfn = page_to_pfn(page); + + WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !pfn_valid(pfn)); + + return PFN_PHYS(pfn); +} /* * 32 bits still uses virt_to_bus() for it's implementation of DMA |