| /* |
| * QEMU System Emulator |
| * |
| * Copyright (c) 2003-2008 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| /* |
| * splitted out ioport related stuffs from vl.c. |
| */ |
| |
| #include "exec/ioport.h" |
| #include "trace.h" |
| #include "exec/memory.h" |
| |
| /***********************************************************/ |
| /* IO Port */ |
| |
| //#define DEBUG_UNUSED_IOPORT |
| //#define DEBUG_IOPORT |
| |
| #ifdef DEBUG_UNUSED_IOPORT |
| # define LOG_UNUSED_IOPORT(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__) |
| #else |
| # define LOG_UNUSED_IOPORT(fmt, ...) do{ } while (0) |
| #endif |
| |
| #ifdef DEBUG_IOPORT |
| # define LOG_IOPORT(...) qemu_log_mask(CPU_LOG_IOPORT, ## __VA_ARGS__) |
| #else |
| # define LOG_IOPORT(...) do { } while (0) |
| #endif |
| |
| /* XXX: use a two level table to limit memory usage */ |
| |
| static void *ioport_opaque[MAX_IOPORTS]; |
| static IOPortReadFunc *ioport_read_table[3][MAX_IOPORTS]; |
| static IOPortWriteFunc *ioport_write_table[3][MAX_IOPORTS]; |
| static IOPortDestructor *ioport_destructor_table[MAX_IOPORTS]; |
| |
| static IOPortReadFunc default_ioport_readb, default_ioport_readw, default_ioport_readl; |
| static IOPortWriteFunc default_ioport_writeb, default_ioport_writew, default_ioport_writel; |
| |
| static uint32_t ioport_read(int index, uint32_t address) |
| { |
| static IOPortReadFunc * const default_func[3] = { |
| default_ioport_readb, |
| default_ioport_readw, |
| default_ioport_readl |
| }; |
| IOPortReadFunc *func = ioport_read_table[index][address]; |
| if (!func) |
| func = default_func[index]; |
| return func(ioport_opaque[address], address); |
| } |
| |
| static void ioport_write(int index, uint32_t address, uint32_t data) |
| { |
| static IOPortWriteFunc * const default_func[3] = { |
| default_ioport_writeb, |
| default_ioport_writew, |
| default_ioport_writel |
| }; |
| IOPortWriteFunc *func = ioport_write_table[index][address]; |
| if (!func) |
| func = default_func[index]; |
| func(ioport_opaque[address], address, data); |
| } |
| |
| static uint32_t default_ioport_readb(void *opaque, uint32_t address) |
| { |
| LOG_UNUSED_IOPORT("unused inb: port=0x%04"PRIx32"\n", address); |
| return 0xff; |
| } |
| |
| static void default_ioport_writeb(void *opaque, uint32_t address, uint32_t data) |
| { |
| LOG_UNUSED_IOPORT("unused outb: port=0x%04"PRIx32" data=0x%02"PRIx32"\n", |
| address, data); |
| } |
| |
| /* default is to make two byte accesses */ |
| static uint32_t default_ioport_readw(void *opaque, uint32_t address) |
| { |
| uint32_t data; |
| data = ioport_read(0, address); |
| address = (address + 1) & IOPORTS_MASK; |
| data |= ioport_read(0, address) << 8; |
| return data; |
| } |
| |
| static void default_ioport_writew(void *opaque, uint32_t address, uint32_t data) |
| { |
| ioport_write(0, address, data & 0xff); |
| address = (address + 1) & IOPORTS_MASK; |
| ioport_write(0, address, (data >> 8) & 0xff); |
| } |
| |
| static uint32_t default_ioport_readl(void *opaque, uint32_t address) |
| { |
| LOG_UNUSED_IOPORT("unused inl: port=0x%04"PRIx32"\n", address); |
| return 0xffffffff; |
| } |
| |
| static void default_ioport_writel(void *opaque, uint32_t address, uint32_t data) |
| { |
| LOG_UNUSED_IOPORT("unused outl: port=0x%04"PRIx32" data=0x%02"PRIx32"\n", |
| address, data); |
| } |
| |
| static int ioport_bsize(int size, int *bsize) |
| { |
| if (size == 1) { |
| *bsize = 0; |
| } else if (size == 2) { |
| *bsize = 1; |
| } else if (size == 4) { |
| *bsize = 2; |
| } else { |
| return -1; |
| } |
| return 0; |
| } |
| |
| /* size is the word size in byte */ |
| int register_ioport_read(pio_addr_t start, int length, int size, |
| IOPortReadFunc *func, void *opaque) |
| { |
| int i, bsize; |
| |
| if (ioport_bsize(size, &bsize)) { |
| hw_error("register_ioport_read: invalid size"); |
| return -1; |
| } |
| for(i = start; i < start + length; ++i) { |
| ioport_read_table[bsize][i] = func; |
| if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque) |
| hw_error("register_ioport_read: invalid opaque for address 0x%x", |
| i); |
| ioport_opaque[i] = opaque; |
| } |
| return 0; |
| } |
| |
| /* size is the word size in byte */ |
| int register_ioport_write(pio_addr_t start, int length, int size, |
| IOPortWriteFunc *func, void *opaque) |
| { |
| int i, bsize; |
| |
| if (ioport_bsize(size, &bsize)) { |
| hw_error("register_ioport_write: invalid size"); |
| return -1; |
| } |
| for(i = start; i < start + length; ++i) { |
| ioport_write_table[bsize][i] = func; |
| if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque) |
| hw_error("register_ioport_write: invalid opaque for address 0x%x", |
| i); |
| ioport_opaque[i] = opaque; |
| } |
| return 0; |
| } |
| |
| static uint32_t ioport_readb_thunk(void *opaque, uint32_t addr) |
| { |
| IORange *ioport = opaque; |
| uint64_t data; |
| |
| ioport->ops->read(ioport, addr - ioport->base, 1, &data); |
| return data; |
| } |
| |
| static uint32_t ioport_readw_thunk(void *opaque, uint32_t addr) |
| { |
| IORange *ioport = opaque; |
| uint64_t data; |
| |
| ioport->ops->read(ioport, addr - ioport->base, 2, &data); |
| return data; |
| } |
| |
| static uint32_t ioport_readl_thunk(void *opaque, uint32_t addr) |
| { |
| IORange *ioport = opaque; |
| uint64_t data; |
| |
| ioport->ops->read(ioport, addr - ioport->base, 4, &data); |
| return data; |
| } |
| |
| static void ioport_writeb_thunk(void *opaque, uint32_t addr, uint32_t data) |
| { |
| IORange *ioport = opaque; |
| |
| ioport->ops->write(ioport, addr - ioport->base, 1, data); |
| } |
| |
| static void ioport_writew_thunk(void *opaque, uint32_t addr, uint32_t data) |
| { |
| IORange *ioport = opaque; |
| |
| ioport->ops->write(ioport, addr - ioport->base, 2, data); |
| } |
| |
| static void ioport_writel_thunk(void *opaque, uint32_t addr, uint32_t data) |
| { |
| IORange *ioport = opaque; |
| |
| ioport->ops->write(ioport, addr - ioport->base, 4, data); |
| } |
| |
| static void iorange_destructor_thunk(void *opaque) |
| { |
| IORange *iorange = opaque; |
| |
| if (iorange->ops->destructor) { |
| iorange->ops->destructor(iorange); |
| } |
| } |
| |
| void ioport_register(IORange *ioport) |
| { |
| register_ioport_read(ioport->base, ioport->len, 1, |
| ioport_readb_thunk, ioport); |
| register_ioport_read(ioport->base, ioport->len, 2, |
| ioport_readw_thunk, ioport); |
| register_ioport_read(ioport->base, ioport->len, 4, |
| ioport_readl_thunk, ioport); |
| register_ioport_write(ioport->base, ioport->len, 1, |
| ioport_writeb_thunk, ioport); |
| register_ioport_write(ioport->base, ioport->len, 2, |
| ioport_writew_thunk, ioport); |
| register_ioport_write(ioport->base, ioport->len, 4, |
| ioport_writel_thunk, ioport); |
| ioport_destructor_table[ioport->base] = iorange_destructor_thunk; |
| } |
| |
| void isa_unassign_ioport(pio_addr_t start, int length) |
| { |
| int i; |
| |
| if (ioport_destructor_table[start]) { |
| ioport_destructor_table[start](ioport_opaque[start]); |
| ioport_destructor_table[start] = NULL; |
| } |
| for(i = start; i < start + length; i++) { |
| ioport_read_table[0][i] = NULL; |
| ioport_read_table[1][i] = NULL; |
| ioport_read_table[2][i] = NULL; |
| |
| ioport_write_table[0][i] = NULL; |
| ioport_write_table[1][i] = NULL; |
| ioport_write_table[2][i] = NULL; |
| |
| ioport_opaque[i] = NULL; |
| } |
| } |
| |
| bool isa_is_ioport_assigned(pio_addr_t start) |
| { |
| return (ioport_read_table[0][start] || ioport_write_table[0][start] || |
| ioport_read_table[1][start] || ioport_write_table[1][start] || |
| ioport_read_table[2][start] || ioport_write_table[2][start]); |
| } |
| |
| /***********************************************************/ |
| |
| void cpu_outb(pio_addr_t addr, uint8_t val) |
| { |
| LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val); |
| trace_cpu_out(addr, val); |
| ioport_write(0, addr, val); |
| } |
| |
| void cpu_outw(pio_addr_t addr, uint16_t val) |
| { |
| LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val); |
| trace_cpu_out(addr, val); |
| ioport_write(1, addr, val); |
| } |
| |
| void cpu_outl(pio_addr_t addr, uint32_t val) |
| { |
| LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val); |
| trace_cpu_out(addr, val); |
| ioport_write(2, addr, val); |
| } |
| |
| uint8_t cpu_inb(pio_addr_t addr) |
| { |
| uint8_t val; |
| val = ioport_read(0, addr); |
| trace_cpu_in(addr, val); |
| LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val); |
| return val; |
| } |
| |
| uint16_t cpu_inw(pio_addr_t addr) |
| { |
| uint16_t val; |
| val = ioport_read(1, addr); |
| trace_cpu_in(addr, val); |
| LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val); |
| return val; |
| } |
| |
| uint32_t cpu_inl(pio_addr_t addr) |
| { |
| uint32_t val; |
| val = ioport_read(2, addr); |
| trace_cpu_in(addr, val); |
| LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val); |
| return val; |
| } |
| |
| void portio_list_init(PortioList *piolist, |
| const MemoryRegionPortio *callbacks, |
| void *opaque, const char *name) |
| { |
| unsigned n = 0; |
| |
| while (callbacks[n].size) { |
| ++n; |
| } |
| |
| piolist->ports = callbacks; |
| piolist->nr = 0; |
| piolist->regions = g_new0(MemoryRegion *, n); |
| piolist->aliases = g_new0(MemoryRegion *, n); |
| piolist->address_space = NULL; |
| piolist->opaque = opaque; |
| piolist->name = name; |
| } |
| |
| void portio_list_destroy(PortioList *piolist) |
| { |
| g_free(piolist->regions); |
| g_free(piolist->aliases); |
| } |
| |
| static void portio_list_add_1(PortioList *piolist, |
| const MemoryRegionPortio *pio_init, |
| unsigned count, unsigned start, |
| unsigned off_low, unsigned off_high) |
| { |
| MemoryRegionPortio *pio; |
| MemoryRegionOps *ops; |
| MemoryRegion *region, *alias; |
| unsigned i; |
| |
| /* Copy the sub-list and null-terminate it. */ |
| pio = g_new(MemoryRegionPortio, count + 1); |
| memcpy(pio, pio_init, sizeof(MemoryRegionPortio) * count); |
| memset(pio + count, 0, sizeof(MemoryRegionPortio)); |
| |
| /* Adjust the offsets to all be zero-based for the region. */ |
| for (i = 0; i < count; ++i) { |
| pio[i].offset -= off_low; |
| } |
| |
| ops = g_new0(MemoryRegionOps, 1); |
| ops->old_portio = pio; |
| |
| region = g_new(MemoryRegion, 1); |
| alias = g_new(MemoryRegion, 1); |
| /* |
| * Use an alias so that the callback is called with an absolute address, |
| * rather than an offset relative to to start + off_low. |
| */ |
| memory_region_init_io(region, ops, piolist->opaque, piolist->name, |
| INT64_MAX); |
| memory_region_init_alias(alias, piolist->name, |
| region, start + off_low, off_high - off_low); |
| memory_region_add_subregion(piolist->address_space, |
| start + off_low, alias); |
| piolist->regions[piolist->nr] = region; |
| piolist->aliases[piolist->nr] = alias; |
| ++piolist->nr; |
| } |
| |
| void portio_list_add(PortioList *piolist, |
| MemoryRegion *address_space, |
| uint32_t start) |
| { |
| const MemoryRegionPortio *pio, *pio_start = piolist->ports; |
| unsigned int off_low, off_high, off_last, count; |
| |
| piolist->address_space = address_space; |
| |
| /* Handle the first entry specially. */ |
| off_last = off_low = pio_start->offset; |
| off_high = off_low + pio_start->len; |
| count = 1; |
| |
| for (pio = pio_start + 1; pio->size != 0; pio++, count++) { |
| /* All entries must be sorted by offset. */ |
| assert(pio->offset >= off_last); |
| off_last = pio->offset; |
| |
| /* If we see a hole, break the region. */ |
| if (off_last > off_high) { |
| portio_list_add_1(piolist, pio_start, count, start, off_low, |
| off_high); |
| /* ... and start collecting anew. */ |
| pio_start = pio; |
| off_low = off_last; |
| off_high = off_low + pio->len; |
| count = 0; |
| } else if (off_last + pio->len > off_high) { |
| off_high = off_last + pio->len; |
| } |
| } |
| |
| /* There will always be an open sub-list. */ |
| portio_list_add_1(piolist, pio_start, count, start, off_low, off_high); |
| } |
| |
| void portio_list_del(PortioList *piolist) |
| { |
| MemoryRegion *mr, *alias; |
| unsigned i; |
| |
| for (i = 0; i < piolist->nr; ++i) { |
| mr = piolist->regions[i]; |
| alias = piolist->aliases[i]; |
| memory_region_del_subregion(piolist->address_space, alias); |
| memory_region_destroy(alias); |
| memory_region_destroy(mr); |
| g_free((MemoryRegionOps *)mr->ops); |
| g_free(mr); |
| g_free(alias); |
| piolist->regions[i] = NULL; |
| piolist->aliases[i] = NULL; |
| } |
| } |