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author | Arnd Bergmann <arnd@arndb.de> | 2022-04-24 14:36:35 +0200 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2022-05-07 22:56:17 +0200 |
commit | 645b302673bb74930b5f38f1d5b7e7532f164595 (patch) | |
tree | 0429d09bd6bef49663611bf46f1a5ae00ecf8afd /arch/arm/include/asm/io.h | |
parent | 5414bea9a462ba66b54f6ceee6e29b0a3b071828 (diff) | |
download | linux-645b302673bb74930b5f38f1d5b7e7532f164595.tar.bz2 |
ARM: pxa/sa1100: move I/O space to PCI_IOBASE
PXA and StrongARM1100 traditionally map their I/O space 1:1 into virtual
memory, using a per-bus io_offset that matches the base address of the
ioremap mapping.
In order for PXA to work in a multiplatform config, this needs to
change so I/O space starts at PCI_IOBASE (0xfee00000). Since the pcmcia
soc_common support is shared with StrongARM1100, both have to change at
the same time. The affected machines are:
- Anything with a PCMCIA slot now uses pci_remap_iospace, which
is made available to PCMCIA configurations as well, rather than
just PCI. The first PCMCIA slot now starts at port number 0x10000.
- The Zeus and Viper platforms have PC/104-style ISA buses,
which have a static mapping for both I/O and memory space at
0xf1000000, which can no longer work. It does not appear to have
any in-tree users, so moving it to port number 0 makes them
behave like a traditional PC.
- SA1100 does support ISA slots in theory, but all machines that
originally enabled this appear to have been removed from the tree
ages ago, and the I/O space is never mapped anywhere.
- The Nanoengine machine has support for PCI slots, but looks
like this never included I/O space, the resources only define the
location for memory and config space.
With this, the definitions of __io() and IO_SPACE_LIMIT can be simplified,
as the only remaining cases are the generic PCI_IOBASE and the custom
inb()/outb() macros on RiscPC. S3C24xx still has a custom inb()/outb()
in this here, but this is already removed in another branch.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/include/asm/io.h')
-rw-r--r-- | arch/arm/include/asm/io.h | 27 |
1 files changed, 4 insertions, 23 deletions
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index 0c70eb688a00..f36ca0da8427 100644 --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -174,7 +174,7 @@ static inline void __iomem *__typesafe_io(unsigned long addr) #define PCI_IO_VIRT_BASE 0xfee00000 #define PCI_IOBASE ((void __iomem *)PCI_IO_VIRT_BASE) -#if defined(CONFIG_PCI) +#if defined(CONFIG_PCI) || IS_ENABLED(CONFIG_PCMCIA) void pci_ioremap_set_mem_type(int mem_type); #else static inline void pci_ioremap_set_mem_type(int mem_type) {} @@ -200,32 +200,13 @@ void __iomem *pci_remap_cfgspace(resource_size_t res_cookie, size_t size); */ #ifdef CONFIG_NEED_MACH_IO_H #include <mach/io.h> -#elif defined(CONFIG_PCI) -#define IO_SPACE_LIMIT ((resource_size_t)0xfffff) -#define __io(a) __typesafe_io(PCI_IO_VIRT_BASE + ((a) & IO_SPACE_LIMIT)) #else -#define __io(a) __typesafe_io((a) & IO_SPACE_LIMIT) -#endif - -/* - * This is the limit of PC card/PCI/ISA IO space, which is by default - * 64K if we have PC card, PCI or ISA support. Otherwise, default to - * zero to prevent ISA/PCI drivers claiming IO space (and potentially - * oopsing.) - * - * Only set this larger if you really need inb() et.al. to operate over - * a larger address space. Note that SOC_COMMON ioremaps each sockets - * IO space area, and so inb() et.al. must be defined to operate as per - * readb() et.al. on such platforms. - */ -#ifndef IO_SPACE_LIMIT -#if defined(CONFIG_PCMCIA_SOC_COMMON) || defined(CONFIG_PCMCIA_SOC_COMMON_MODULE) -#define IO_SPACE_LIMIT ((resource_size_t)0xffffffff) -#elif defined(CONFIG_PCI) || defined(CONFIG_ISA) || defined(CONFIG_PCCARD) -#define IO_SPACE_LIMIT ((resource_size_t)0xffff) +#if IS_ENABLED(CONFIG_PCMCIA) || defined(CONFIG_PCI) +#define IO_SPACE_LIMIT ((resource_size_t)0xfffff) #else #define IO_SPACE_LIMIT ((resource_size_t)0) #endif +#define __io(a) __typesafe_io(PCI_IO_VIRT_BASE + ((a) & IO_SPACE_LIMIT)) #endif /* |