/* $OpenBSD: bwx.c,v 1.8 2014/12/13 16:26:13 miod Exp $ */ /*- * Copyright (c) 1998 Doug Rabson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include "io.h" #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) #define trunc_page(x) ((x) & ~PAGE_MASK) #define PATH_APERTURE "/dev/xf86" #define mb() __asm__ volatile("mb" : : : "memory") #define wmb() __asm__ volatile("wmb" : : : "memory") static int mem_fd = -1; /* file descriptor to /dev/mem */ static void *bwx_int1_ports = MAP_FAILED; /* mapped int1 io ports */ static void *bwx_int2_ports = MAP_FAILED; /* mapped int2 io ports */ static void *bwx_int4_ports = MAP_FAILED; /* mapped int4 io ports */ static u_int64_t bwx_io_base; /* physical address of ports */ static u_int64_t bwx_mem_base; /* physical address of bwx mem */ static void bwx_open_mem(void) { if (mem_fd != -1) return; mem_fd = open(_PATH_MEM, O_RDWR); if (mem_fd < 0) mem_fd = open(PATH_APERTURE, O_RDWR); if (mem_fd < 0) err(1, "Failed to open both %s and %s", _PATH_MEM, PATH_APERTURE); } static void bwx_close_mem(void) { if (mem_fd != -1) { close(mem_fd); mem_fd = -1; } } static void bwx_init(void) { size_t len = sizeof(u_int64_t); int error; int mib[3]; mib[0] = CTL_MACHDEP; mib[1] = CPU_CHIPSET; mib[2] = CPU_CHIPSET_PORTS; if ((error = sysctl(mib, 3, &bwx_io_base, &len, NULL, 0)) < 0) err(1, "machdep.chipset.ports_base"); mib[2] = CPU_CHIPSET_MEM; if ((error = sysctl(mib, 3, &bwx_mem_base, &len, 0, 0)) < 0) err(1, "machdep.chipset.memory"); } static int bwx_ioperm(u_int32_t from, u_int32_t num, int on) { u_int32_t start, end; if (bwx_int1_ports == MAP_FAILED) bwx_init(); if (!on) return -1; /* XXX can't unmap yet */ if (bwx_int1_ports != MAP_FAILED) return 0; bwx_open_mem(); start = trunc_page(from); end = round_page(from + num); if ((bwx_int1_ports = mmap(0, end-start, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, bwx_io_base + BWX_EV56_INT1 + start)) == MAP_FAILED) err(1, "mmap int1"); if ((bwx_int2_ports = mmap(0, end-start, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, bwx_io_base + BWX_EV56_INT2 + start)) == MAP_FAILED) err(1, "mmap int2"); if ((bwx_int4_ports = mmap(0, end-start, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, bwx_io_base + BWX_EV56_INT4 + start)) == MAP_FAILED) err(1, "mmap int4"); bwx_close_mem(); return 0; } static u_int8_t bwx_inb(u_int32_t port) { mb(); return alpha_ldbu(bwx_int1_ports + port); } static u_int16_t bwx_inw(u_int32_t port) { mb(); return alpha_ldwu(bwx_int2_ports + port); } static u_int32_t bwx_inl(u_int32_t port) { mb(); return alpha_ldlu(bwx_int4_ports + port); } static void bwx_outb(u_int32_t port, u_int8_t val) { alpha_stb(bwx_int1_ports + port, val); mb(); wmb(); } static void bwx_outw(u_int32_t port, u_int16_t val) { alpha_stw(bwx_int2_ports + port, val); mb(); wmb(); } static void bwx_outl(u_int32_t port, u_int32_t val) { alpha_stl(bwx_int4_ports + port, val); mb(); wmb(); } struct bwx_mem_handle { void *virt1; /* int1 address in user address-space */ void *virt2; /* int2 address in user address-space */ void *virt4; /* int4 address in user address-space */ }; static void * bwx_map_memory(u_int32_t address, u_int32_t size) { struct bwx_mem_handle *h; size_t sz = (size_t)size << 5; h = malloc(sizeof(struct bwx_mem_handle)); if (h == NULL) return NULL; bwx_open_mem(); h->virt1 = mmap(0, sz, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, bwx_mem_base + BWX_EV56_INT1 + address); if (h->virt1 == MAP_FAILED) { bwx_close_mem(); free(h); return NULL; } h->virt2 = mmap(0, sz, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, bwx_mem_base + BWX_EV56_INT2 + address); if (h->virt2 == MAP_FAILED) { munmap(h->virt1, sz); bwx_close_mem(); free(h); return NULL; } h->virt4 = mmap(0, sz, PROT_READ|PROT_WRITE, MAP_SHARED, mem_fd, bwx_mem_base + BWX_EV56_INT4 + address); if (h->virt4 == MAP_FAILED) { munmap(h->virt1, sz); munmap(h->virt2, sz); bwx_close_mem(); free(h); return NULL; } bwx_close_mem(); return h; } static void bwx_unmap_memory(void *handle, u_int32_t size) { struct bwx_mem_handle *h = handle; size_t sz = (size_t)size << 5; munmap(h->virt1, sz); munmap(h->virt2, sz); munmap(h->virt4, sz); free(h); } static u_int8_t bwx_readb(void *handle, u_int32_t offset) { struct bwx_mem_handle *h = handle; return alpha_ldbu(h->virt1 + offset); } static u_int16_t bwx_readw(void *handle, u_int32_t offset) { struct bwx_mem_handle *h = handle; return alpha_ldwu(h->virt2 + offset); } static u_int32_t bwx_readl(void *handle, u_int32_t offset) { struct bwx_mem_handle *h = handle; return alpha_ldlu(h->virt4 + offset); } static void bwx_writeb(void *handle, u_int32_t offset, u_int8_t val) { struct bwx_mem_handle *h = handle; alpha_stb(h->virt1 + offset, val); } static void bwx_writew(void *handle, u_int32_t offset, u_int16_t val) { struct bwx_mem_handle *h = handle; alpha_stw(h->virt2 + offset, val); } static void bwx_writel(void *handle, u_int32_t offset, u_int32_t val) { struct bwx_mem_handle *h = handle; alpha_stl(h->virt4 + offset, val); } struct io_ops bwx_io_ops = { bwx_ioperm, bwx_inb, bwx_inw, bwx_inl, bwx_outb, bwx_outw, bwx_outl, bwx_map_memory, bwx_unmap_memory, bwx_readb, bwx_readw, bwx_readl, bwx_writeb, bwx_writew, bwx_writel, };