/* $NetBSD: footbridge_io.c,v 1.22.22.1 2017/07/05 15:48:01 martin Exp $ */ /* * Copyright (c) 1997 Causality Limited * Copyright (c) 1997 Mark Brinicombe. * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Mark Brinicombe * for the NetBSD Project. * 4. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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. */ /* * bus_space I/O functions for footbridge */ #include __KERNEL_RCSID(0, "$NetBSD: footbridge_io.c,v 1.22.22.1 2017/07/05 15:48:01 martin Exp $"); #include #include #include #include #include #include /* Proto types for all the bus_space structure functions */ bs_protos(footbridge); bs_protos(generic); bs_protos(generic_armv4); bs_protos(bs_notimpl); bs_map_proto(footbridge_mem); bs_unmap_proto(footbridge_mem); bs_mmap_proto(footbridge_io); bs_mmap_proto(footbridge_mem); /* Declare the footbridge bus space tag */ struct bus_space footbridge_bs_tag = { /* cookie */ (void *) 0, /* Base address */ /* mapping/unmapping */ footbridge_bs_map, footbridge_bs_unmap, footbridge_bs_subregion, /* allocation/deallocation */ footbridge_bs_alloc, footbridge_bs_free, /* get kernel virtual address */ footbridge_bs_vaddr, /* Mmap bus space for user */ bs_notimpl_bs_mmap, /* barrier */ footbridge_bs_barrier, /* read (single) */ generic_bs_r_1, generic_armv4_bs_r_2, generic_bs_r_4, bs_notimpl_bs_r_8, /* read multiple */ generic_bs_rm_1, generic_armv4_bs_rm_2, generic_bs_rm_4, bs_notimpl_bs_rm_8, /* read region */ bs_notimpl_bs_rr_1, generic_armv4_bs_rr_2, generic_bs_rr_4, bs_notimpl_bs_rr_8, /* write (single) */ generic_bs_w_1, generic_armv4_bs_w_2, generic_bs_w_4, bs_notimpl_bs_w_8, /* write multiple */ generic_bs_wm_1, generic_armv4_bs_wm_2, generic_bs_wm_4, bs_notimpl_bs_wm_8, /* write region */ bs_notimpl_bs_wr_1, generic_armv4_bs_wr_2, generic_bs_wr_4, bs_notimpl_bs_wr_8, /* set multiple */ bs_notimpl_bs_sm_1, bs_notimpl_bs_sm_2, bs_notimpl_bs_sm_4, bs_notimpl_bs_sm_8, /* set region */ bs_notimpl_bs_sr_1, generic_armv4_bs_sr_2, bs_notimpl_bs_sr_4, bs_notimpl_bs_sr_8, /* copy */ bs_notimpl_bs_c_1, generic_armv4_bs_c_2, bs_notimpl_bs_c_4, bs_notimpl_bs_c_8, }; void footbridge_create_io_bs_tag( struct bus_space *t, void *cookie) { *t = footbridge_bs_tag; t->bs_cookie = cookie; t->bs_mmap = footbridge_io_bs_mmap; } void footbridge_create_mem_bs_tag( struct bus_space *t, void *cookie) { *t = footbridge_bs_tag; t->bs_map = footbridge_mem_bs_map; t->bs_unmap = footbridge_mem_bs_unmap; t->bs_mmap = footbridge_mem_bs_mmap; t->bs_cookie = cookie; } /* bus space functions */ int footbridge_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, bus_space_handle_t *bshp) { /* * The whole 64K of PCI space is always completely mapped during * boot. * * Eventually this function will do the mapping check overlapping / * multiple mappings. */ /* The cookie is the base address for the I/O area */ *bshp = bpa + (bus_addr_t)t; return(0); } int footbridge_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, bus_space_handle_t *bshp) { paddr_t startpa, endpa, pa; const struct pmap_devmap *pd; /* Round the allocation to page boundries */ startpa = trunc_page(bpa); endpa = round_page(bpa + size); /* * Check for mappings below 1MB as we have this space already * mapped. In practice it is only the VGA hole that takes * advantage of this. */ if (endpa < DC21285_PCI_ISA_MEM_VSIZE) { /* Store the bus space handle */ *bshp = DC21285_PCI_ISA_MEM_VBASE + bpa; return 0; } pa = bpa; if ((pd = pmap_devmap_find_pa(pa, size)) != NULL) { /* Device was statically mapped. */ *bshp = pd->pd_va + (pa - pd->pd_pa); return 0; } /* * Eventually this function will do the mapping check for overlapping / * multiple mappings */ vaddr_t va = uvm_km_alloc(kernel_map, endpa - startpa, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT); if (va == 0) return ENOMEM; /* Store the bus space handle */ *bshp = va + (bpa & PGOFSET); /* Now map the pages */ /* The cookie is the physical base address for the I/O area */ const int pmapflags = (flags & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) ? 0 : PMAP_NOCACHE; for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { pmap_kenter_pa(va, (bus_addr_t)t + pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags); } pmap_update(pmap_kernel()); /* if (bpa >= DC21285_PCI_MEM_VSIZE && bpa != DC21285_ARMCSR_VBASE) panic("footbridge_bs_map: Address out of range (%08lx)", bpa); */ return(0); } int footbridge_bs_alloc( void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable, bus_addr_t *bpap, bus_space_handle_t *bshp) { panic("footbridge_alloc(): Help!"); } void footbridge_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) { /* * Temporary implementation */ } void footbridge_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) { vaddr_t startva, endva; /* * Check for mappings below 1MB as we have this space permenantly * mapped. In practice it is only the VGA hole that takes * advantage of this. */ if (bsh >= DC21285_PCI_ISA_MEM_VBASE && bsh < (DC21285_PCI_ISA_MEM_VBASE + DC21285_PCI_ISA_MEM_VSIZE)) { return; } startva = trunc_page(bsh); endva = round_page(bsh + size); pmap_kremove(startva, endva); pmap_update(pmap_kernel()); uvm_km_free(kernel_map, startva, endva - startva, UVM_KMF_VAONLY); } void footbridge_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) { panic("footbridge_free(): Help!"); /* footbridge_bs_unmap() does all that we need to do. */ /* footbridge_bs_unmap(t, bsh, size);*/ } int footbridge_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) { *nbshp = bsh + (offset << ((int)t)); return (0); } void * footbridge_bs_vaddr(void *t, bus_space_handle_t bsh) { return ((void *)bsh); } void footbridge_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags) { } paddr_t footbridge_io_bs_mmap(void *t, bus_addr_t addr, off_t offset, int prot, int flags) { paddr_t pa; /* allow mapping of IO space */ if (addr >= DC21285_PCI_IO_SIZE || addr >= DC21285_PCI_IO_SIZE - offset || offset < 0 || offset >= DC21285_PCI_IO_SIZE) return -1; pa = DC21285_PCI_IO_BASE + addr + offset; return arm_btop(pa); } paddr_t footbridge_mem_bs_mmap(void *t, bus_addr_t addr, off_t offset, int prot, int flags) { paddr_t pa; if (addr >= DC21285_PCI_MEM_SIZE || offset < 0 || offset >= DC21285_PCI_MEM_SIZE || addr >= DC21285_PCI_MEM_SIZE - offset) return -1; pa = DC21285_PCI_MEM_BASE + addr + offset; return arm_btop(pa); }