1 #ifndef __ASM_SH_IO_H 2 #define __ASM_SH_IO_H 3 /* 4 * Convention: 5 * read{b,w,l,q}/write{b,w,l,q} are for PCI, 6 * while in{b,w,l}/out{b,w,l} are for ISA 7 * 8 * In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p 9 * and 'string' versions: ins{b,w,l}/outs{b,w,l} 10 * 11 * While read{b,w,l,q} and write{b,w,l,q} contain memory barriers 12 * automatically, there are also __raw versions, which do not. 13 * 14 * Historically, we have also had ctrl_in{b,w,l,q}/ctrl_out{b,w,l,q} for 15 * SuperH specific I/O (raw I/O to on-chip CPU peripherals). In practice 16 * these have the same semantics as the __raw variants, and as such, all 17 * new code should be using the __raw versions. 18 * 19 * All ISA I/O routines are wrapped through the machine vector. If a 20 * board does not provide overrides, a generic set that are copied in 21 * from the default machine vector are used instead. These are largely 22 * for old compat code for I/O offseting to SuperIOs, all of which are 23 * better handled through the machvec ioport mapping routines these days. 24 */ 25 #include <asm/cache.h> 26 #include <asm/system.h> 27 #include <asm/addrspace.h> 28 #include <asm/machvec.h> 29 #include <asm/pgtable.h> 30 #include <asm-generic/iomap.h> 31 32 #ifdef __KERNEL__ 33 /* 34 * Depending on which platform we are running on, we need different 35 * I/O functions. 36 */ 37 #define __IO_PREFIX generic 38 #include <asm/io_generic.h> 39 #include <asm/io_trapped.h> 40 41 #define inb(p) sh_mv.mv_inb((p)) 42 #define inw(p) sh_mv.mv_inw((p)) 43 #define inl(p) sh_mv.mv_inl((p)) 44 #define outb(x,p) sh_mv.mv_outb((x),(p)) 45 #define outw(x,p) sh_mv.mv_outw((x),(p)) 46 #define outl(x,p) sh_mv.mv_outl((x),(p)) 47 48 #define inb_p(p) sh_mv.mv_inb_p((p)) 49 #define inw_p(p) sh_mv.mv_inw_p((p)) 50 #define inl_p(p) sh_mv.mv_inl_p((p)) 51 #define outb_p(x,p) sh_mv.mv_outb_p((x),(p)) 52 #define outw_p(x,p) sh_mv.mv_outw_p((x),(p)) 53 #define outl_p(x,p) sh_mv.mv_outl_p((x),(p)) 54 55 #define insb(p,b,c) sh_mv.mv_insb((p), (b), (c)) 56 #define insw(p,b,c) sh_mv.mv_insw((p), (b), (c)) 57 #define insl(p,b,c) sh_mv.mv_insl((p), (b), (c)) 58 #define outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c)) 59 #define outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c)) 60 #define outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c)) 61 62 #define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile u8 __force *)(a) = (v)) 63 #define __raw_writew(v,a) (__chk_io_ptr(a), *(volatile u16 __force *)(a) = (v)) 64 #define __raw_writel(v,a) (__chk_io_ptr(a), *(volatile u32 __force *)(a) = (v)) 65 #define __raw_writeq(v,a) (__chk_io_ptr(a), *(volatile u64 __force *)(a) = (v)) 66 67 #define __raw_readb(a) (__chk_io_ptr(a), *(volatile u8 __force *)(a)) 68 #define __raw_readw(a) (__chk_io_ptr(a), *(volatile u16 __force *)(a)) 69 #define __raw_readl(a) (__chk_io_ptr(a), *(volatile u32 __force *)(a)) 70 #define __raw_readq(a) (__chk_io_ptr(a), *(volatile u64 __force *)(a)) 71 72 #define readb(a) ({ u8 r_ = __raw_readb(a); mb(); r_; }) 73 #define readw(a) ({ u16 r_ = __raw_readw(a); mb(); r_; }) 74 #define readl(a) ({ u32 r_ = __raw_readl(a); mb(); r_; }) 75 #define readq(a) ({ u64 r_ = __raw_readq(a); mb(); r_; }) 76 77 #define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); }) 78 #define writew(v,a) ({ __raw_writew((v),(a)); mb(); }) 79 #define writel(v,a) ({ __raw_writel((v),(a)); mb(); }) 80 #define writeq(v,a) ({ __raw_writeq((v),(a)); mb(); }) 81 82 /* SuperH on-chip I/O functions */ 83 #define ctrl_inb __raw_readb 84 #define ctrl_inw __raw_readw 85 #define ctrl_inl __raw_readl 86 #define ctrl_inq __raw_readq 87 88 #define ctrl_outb __raw_writeb 89 #define ctrl_outw __raw_writew 90 #define ctrl_outl __raw_writel 91 #define ctrl_outq __raw_writeq 92 93 static inline void ctrl_delay(void) 94 { 95 #ifdef CONFIG_CPU_SH4 96 __raw_readw(CCN_PVR); 97 #elif defined(P2SEG) 98 __raw_readw(P2SEG); 99 #else 100 #error "Need a dummy address for delay" 101 #endif 102 } 103 104 #define __BUILD_MEMORY_STRING(bwlq, type) \ 105 \ 106 static inline void __raw_writes##bwlq(volatile void __iomem *mem, \ 107 const void *addr, unsigned int count) \ 108 { \ 109 const volatile type *__addr = addr; \ 110 \ 111 while (count--) { \ 112 __raw_write##bwlq(*__addr, mem); \ 113 __addr++; \ 114 } \ 115 } \ 116 \ 117 static inline void __raw_reads##bwlq(volatile void __iomem *mem, \ 118 void *addr, unsigned int count) \ 119 { \ 120 volatile type *__addr = addr; \ 121 \ 122 while (count--) { \ 123 *__addr = __raw_read##bwlq(mem); \ 124 __addr++; \ 125 } \ 126 } 127 128 __BUILD_MEMORY_STRING(b, u8) 129 __BUILD_MEMORY_STRING(w, u16) 130 131 #ifdef CONFIG_SUPERH32 132 void __raw_writesl(void __iomem *addr, const void *data, int longlen); 133 void __raw_readsl(const void __iomem *addr, void *data, int longlen); 134 #else 135 __BUILD_MEMORY_STRING(l, u32) 136 #endif 137 138 __BUILD_MEMORY_STRING(q, u64) 139 140 #define writesb __raw_writesb 141 #define writesw __raw_writesw 142 #define writesl __raw_writesl 143 144 #define readsb __raw_readsb 145 #define readsw __raw_readsw 146 #define readsl __raw_readsl 147 148 #define readb_relaxed(a) readb(a) 149 #define readw_relaxed(a) readw(a) 150 #define readl_relaxed(a) readl(a) 151 #define readq_relaxed(a) readq(a) 152 153 #ifndef CONFIG_GENERIC_IOMAP 154 /* Simple MMIO */ 155 #define ioread8(a) __raw_readb(a) 156 #define ioread16(a) __raw_readw(a) 157 #define ioread16be(a) be16_to_cpu(__raw_readw((a))) 158 #define ioread32(a) __raw_readl(a) 159 #define ioread32be(a) be32_to_cpu(__raw_readl((a))) 160 161 #define iowrite8(v,a) __raw_writeb((v),(a)) 162 #define iowrite16(v,a) __raw_writew((v),(a)) 163 #define iowrite16be(v,a) __raw_writew(cpu_to_be16((v)),(a)) 164 #define iowrite32(v,a) __raw_writel((v),(a)) 165 #define iowrite32be(v,a) __raw_writel(cpu_to_be32((v)),(a)) 166 167 #define ioread8_rep(a, d, c) __raw_readsb((a), (d), (c)) 168 #define ioread16_rep(a, d, c) __raw_readsw((a), (d), (c)) 169 #define ioread32_rep(a, d, c) __raw_readsl((a), (d), (c)) 170 171 #define iowrite8_rep(a, s, c) __raw_writesb((a), (s), (c)) 172 #define iowrite16_rep(a, s, c) __raw_writesw((a), (s), (c)) 173 #define iowrite32_rep(a, s, c) __raw_writesl((a), (s), (c)) 174 #endif 175 176 #define mmio_insb(p,d,c) __raw_readsb(p,d,c) 177 #define mmio_insw(p,d,c) __raw_readsw(p,d,c) 178 #define mmio_insl(p,d,c) __raw_readsl(p,d,c) 179 180 #define mmio_outsb(p,s,c) __raw_writesb(p,s,c) 181 #define mmio_outsw(p,s,c) __raw_writesw(p,s,c) 182 #define mmio_outsl(p,s,c) __raw_writesl(p,s,c) 183 184 /* synco on SH-4A, otherwise a nop */ 185 #define mmiowb() wmb() 186 187 #define IO_SPACE_LIMIT 0xffffffff 188 189 extern unsigned long generic_io_base; 190 191 /* 192 * This function provides a method for the generic case where a 193 * board-specific ioport_map simply needs to return the port + some 194 * arbitrary port base. 195 * 196 * We use this at board setup time to implicitly set the port base, and 197 * as a result, we can use the generic ioport_map. 198 */ 199 static inline void __set_io_port_base(unsigned long pbase) 200 { 201 generic_io_base = pbase; 202 } 203 204 #define __ioport_map(p, n) sh_mv.mv_ioport_map((p), (n)) 205 206 /* We really want to try and get these to memcpy etc */ 207 void memcpy_fromio(void *, const volatile void __iomem *, unsigned long); 208 void memcpy_toio(volatile void __iomem *, const void *, unsigned long); 209 void memset_io(volatile void __iomem *, int, unsigned long); 210 211 /* Quad-word real-mode I/O, don't ask.. */ 212 unsigned long long peek_real_address_q(unsigned long long addr); 213 unsigned long long poke_real_address_q(unsigned long long addr, 214 unsigned long long val); 215 216 #if !defined(CONFIG_MMU) 217 #define virt_to_phys(address) ((unsigned long)(address)) 218 #define phys_to_virt(address) ((void *)(address)) 219 #else 220 #define virt_to_phys(address) (__pa(address)) 221 #define phys_to_virt(address) (__va(address)) 222 #endif 223 224 /* 225 * On 32-bit SH, we traditionally have the whole physical address space 226 * mapped at all times (as MIPS does), so "ioremap()" and "iounmap()" do 227 * not need to do anything but place the address in the proper segment. 228 * This is true for P1 and P2 addresses, as well as some P3 ones. 229 * However, most of the P3 addresses and newer cores using extended 230 * addressing need to map through page tables, so the ioremap() 231 * implementation becomes a bit more complicated. 232 * 233 * See arch/sh/mm/ioremap.c for additional notes on this. 234 * 235 * We cheat a bit and always return uncachable areas until we've fixed 236 * the drivers to handle caching properly. 237 * 238 * On the SH-5 the concept of segmentation in the 1:1 PXSEG sense simply 239 * doesn't exist, so everything must go through page tables. 240 */ 241 #ifdef CONFIG_MMU 242 void __iomem *__ioremap(unsigned long offset, unsigned long size, 243 unsigned long flags); 244 void __iounmap(void __iomem *addr); 245 246 static inline void __iomem * 247 __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags) 248 { 249 #if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED) 250 unsigned long last_addr = offset + size - 1; 251 #endif 252 void __iomem *ret; 253 254 ret = __ioremap_trapped(offset, size); 255 if (ret) 256 return ret; 257 258 #if defined(CONFIG_SUPERH32) && !defined(CONFIG_PMB_FIXED) 259 /* 260 * For P1 and P2 space this is trivial, as everything is already 261 * mapped. Uncached access for P1 addresses are done through P2. 262 * In the P3 case or for addresses outside of the 29-bit space, 263 * mapping must be done by the PMB or by using page tables. 264 */ 265 if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) { 266 if (unlikely(flags & _PAGE_CACHABLE)) 267 return (void __iomem *)P1SEGADDR(offset); 268 269 return (void __iomem *)P2SEGADDR(offset); 270 } 271 272 /* P4 above the store queues are always mapped. */ 273 if (unlikely(offset >= P3_ADDR_MAX)) 274 return (void __iomem *)P4SEGADDR(offset); 275 #endif 276 277 return __ioremap(offset, size, flags); 278 } 279 #else 280 #define __ioremap_mode(offset, size, flags) ((void __iomem *)(offset)) 281 #define __iounmap(addr) do { } while (0) 282 #endif /* CONFIG_MMU */ 283 284 #define ioremap(offset, size) \ 285 __ioremap_mode((offset), (size), 0) 286 #define ioremap_nocache(offset, size) \ 287 __ioremap_mode((offset), (size), 0) 288 #define ioremap_cache(offset, size) \ 289 __ioremap_mode((offset), (size), _PAGE_CACHABLE) 290 #define p3_ioremap(offset, size, flags) \ 291 __ioremap((offset), (size), (flags)) 292 #define ioremap_prot(offset, size, flags) \ 293 __ioremap_mode((offset), (size), (flags)) 294 #define iounmap(addr) \ 295 __iounmap((addr)) 296 297 #define maybebadio(port) \ 298 printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \ 299 __func__, __LINE__, (port), (u32)__builtin_return_address(0)) 300 301 /* 302 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 303 * access 304 */ 305 #define xlate_dev_mem_ptr(p) __va(p) 306 307 /* 308 * Convert a virtual cached pointer to an uncached pointer 309 */ 310 #define xlate_dev_kmem_ptr(p) p 311 312 #define ARCH_HAS_VALID_PHYS_ADDR_RANGE 313 int valid_phys_addr_range(unsigned long addr, size_t size); 314 int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); 315 316 #endif /* __KERNEL__ */ 317 318 #endif /* __ASM_SH_IO_H */ 319