root / hw / omap_l4.c @ 8f354003
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/*
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* TI OMAP L4 interconnect emulation.
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*
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* Copyright (C) 2007-2009 Nokia Corporation
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* Written by Andrzej Zaborowski <andrew@openedhand.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) any later version of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw.h" |
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#include "omap.h" |
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#ifdef L4_MUX_HACK
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static int omap_l4_io_entries; |
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static int omap_cpu_io_entry; |
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static struct omap_l4_entry { |
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CPUReadMemoryFunc * const *mem_read;
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CPUWriteMemoryFunc * const *mem_write;
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void *opaque;
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} *omap_l4_io_entry; |
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static CPUReadMemoryFunc * const *omap_l4_io_readb_fn; |
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static CPUReadMemoryFunc * const *omap_l4_io_readh_fn; |
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static CPUReadMemoryFunc * const *omap_l4_io_readw_fn; |
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static CPUWriteMemoryFunc * const *omap_l4_io_writeb_fn; |
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static CPUWriteMemoryFunc * const *omap_l4_io_writeh_fn; |
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static CPUWriteMemoryFunc * const *omap_l4_io_writew_fn; |
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static void **omap_l4_io_opaque; |
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int l4_register_io_memory(CPUReadMemoryFunc * const *mem_read, |
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CPUWriteMemoryFunc * const *mem_write, void *opaque) |
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{ |
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omap_l4_io_entry[omap_l4_io_entries].mem_read = mem_read; |
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omap_l4_io_entry[omap_l4_io_entries].mem_write = mem_write; |
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omap_l4_io_entry[omap_l4_io_entries].opaque = opaque; |
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return omap_l4_io_entries ++;
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} |
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static uint32_t omap_l4_io_readb(void *opaque, target_phys_addr_t addr) |
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{ |
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unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS; |
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return omap_l4_io_readb_fn[i](omap_l4_io_opaque[i], addr);
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} |
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static uint32_t omap_l4_io_readh(void *opaque, target_phys_addr_t addr) |
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{ |
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unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS; |
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return omap_l4_io_readh_fn[i](omap_l4_io_opaque[i], addr);
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} |
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static uint32_t omap_l4_io_readw(void *opaque, target_phys_addr_t addr) |
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{ |
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unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS; |
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return omap_l4_io_readw_fn[i](omap_l4_io_opaque[i], addr);
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} |
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static void omap_l4_io_writeb(void *opaque, target_phys_addr_t addr, |
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uint32_t value) |
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{ |
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unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS; |
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return omap_l4_io_writeb_fn[i](omap_l4_io_opaque[i], addr, value);
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} |
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static void omap_l4_io_writeh(void *opaque, target_phys_addr_t addr, |
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uint32_t value) |
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{ |
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unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS; |
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return omap_l4_io_writeh_fn[i](omap_l4_io_opaque[i], addr, value);
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} |
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static void omap_l4_io_writew(void *opaque, target_phys_addr_t addr, |
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uint32_t value) |
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{ |
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unsigned int i = (addr - OMAP2_L4_BASE) >> TARGET_PAGE_BITS; |
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return omap_l4_io_writew_fn[i](omap_l4_io_opaque[i], addr, value);
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} |
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static CPUReadMemoryFunc * const omap_l4_io_readfn[] = { |
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omap_l4_io_readb, |
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omap_l4_io_readh, |
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omap_l4_io_readw, |
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}; |
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static CPUWriteMemoryFunc * const omap_l4_io_writefn[] = { |
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omap_l4_io_writeb, |
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omap_l4_io_writeh, |
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omap_l4_io_writew, |
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}; |
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#else
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int l4_register_io_memory(CPUReadMemoryFunc * const *mem_read, |
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CPUWriteMemoryFunc * const *mem_write,
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void *opaque)
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{ |
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return cpu_register_io_memory(mem_read, mem_write, opaque);
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} |
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#endif
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struct omap_l4_s {
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target_phys_addr_t base; |
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int ta_num;
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struct omap_target_agent_s ta[0]; |
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}; |
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struct omap_l4_s *omap_l4_init(target_phys_addr_t base, int ta_num) |
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{ |
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struct omap_l4_s *bus = qemu_mallocz(
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sizeof(*bus) + ta_num * sizeof(*bus->ta)); |
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bus->ta_num = ta_num; |
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bus->base = base; |
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#ifdef L4_MUX_HACK
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omap_l4_io_entries = 1;
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omap_l4_io_entry = qemu_mallocz(125 * sizeof(*omap_l4_io_entry)); |
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omap_cpu_io_entry = |
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cpu_register_io_memory(omap_l4_io_readfn, |
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omap_l4_io_writefn, bus); |
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# define L4_PAGES (0xb4000 / TARGET_PAGE_SIZE) |
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omap_l4_io_readb_fn = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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omap_l4_io_readh_fn = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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omap_l4_io_readw_fn = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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omap_l4_io_writeb_fn = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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omap_l4_io_writeh_fn = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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omap_l4_io_writew_fn = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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omap_l4_io_opaque = qemu_mallocz(sizeof(void *) * L4_PAGES); |
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#endif
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return bus;
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} |
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static uint32_t omap_l4ta_read(void *opaque, target_phys_addr_t addr) |
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{ |
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struct omap_target_agent_s *s = (struct omap_target_agent_s *) opaque; |
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switch (addr) {
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case 0x00: /* COMPONENT */ |
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return s->component;
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case 0x20: /* AGENT_CONTROL */ |
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return s->control;
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case 0x28: /* AGENT_STATUS */ |
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return s->status;
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} |
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OMAP_BAD_REG(addr); |
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return 0; |
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} |
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static void omap_l4ta_write(void *opaque, target_phys_addr_t addr, |
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uint32_t value) |
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{ |
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struct omap_target_agent_s *s = (struct omap_target_agent_s *) opaque; |
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switch (addr) {
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case 0x00: /* COMPONENT */ |
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case 0x28: /* AGENT_STATUS */ |
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OMAP_RO_REG(addr); |
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break;
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case 0x20: /* AGENT_CONTROL */ |
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s->control = value & 0x01000700;
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if (value & 1) /* OCP_RESET */ |
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s->status &= ~1; /* REQ_TIMEOUT */ |
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break;
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default:
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OMAP_BAD_REG(addr); |
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} |
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} |
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static CPUReadMemoryFunc * const omap_l4ta_readfn[] = { |
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omap_badwidth_read16, |
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omap_l4ta_read, |
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omap_badwidth_read16, |
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}; |
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static CPUWriteMemoryFunc * const omap_l4ta_writefn[] = { |
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omap_badwidth_write32, |
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omap_badwidth_write32, |
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omap_l4ta_write, |
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}; |
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struct omap_target_agent_s *omap_l4ta_get(struct omap_l4_s *bus, |
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const struct omap_l4_region_s *regions, |
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const struct omap_l4_agent_info_s *agents, |
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int cs)
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{ |
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int i, iomemtype;
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struct omap_target_agent_s *ta = NULL; |
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const struct omap_l4_agent_info_s *info = NULL; |
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for (i = 0; i < bus->ta_num; i ++) |
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if (agents[i].ta == cs) {
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ta = &bus->ta[i]; |
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info = &agents[i]; |
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break;
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} |
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if (!ta) {
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fprintf(stderr, "%s: bad target agent (%i)\n", __FUNCTION__, cs);
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exit(-1);
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} |
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ta->bus = bus; |
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ta->start = ®ions[info->region]; |
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ta->regions = info->regions; |
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ta->component = ('Q' << 24) | ('E' << 16) | ('M' << 8) | ('U' << 0); |
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ta->status = 0x00000000;
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ta->control = 0x00000200; /* XXX 01000200 for L4TAO */ |
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iomemtype = l4_register_io_memory(omap_l4ta_readfn, |
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omap_l4ta_writefn, ta); |
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ta->base = omap_l4_attach(ta, info->ta_region, iomemtype); |
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return ta;
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} |
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target_phys_addr_t omap_l4_attach(struct omap_target_agent_s *ta, int region, |
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int iotype)
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{ |
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target_phys_addr_t base; |
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ssize_t size; |
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#ifdef L4_MUX_HACK
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int i;
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#endif
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if (region < 0 || region >= ta->regions) { |
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fprintf(stderr, "%s: bad io region (%i)\n", __FUNCTION__, region);
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exit(-1);
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} |
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base = ta->bus->base + ta->start[region].offset; |
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size = ta->start[region].size; |
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if (iotype) {
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#ifndef L4_MUX_HACK
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cpu_register_physical_memory(base, size, iotype); |
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#else
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cpu_register_physical_memory(base, size, omap_cpu_io_entry); |
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i = (base - ta->bus->base) / TARGET_PAGE_SIZE; |
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for (; size > 0; size -= TARGET_PAGE_SIZE, i ++) { |
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omap_l4_io_readb_fn[i] = omap_l4_io_entry[iotype].mem_read[0];
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omap_l4_io_readh_fn[i] = omap_l4_io_entry[iotype].mem_read[1];
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omap_l4_io_readw_fn[i] = omap_l4_io_entry[iotype].mem_read[2];
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omap_l4_io_writeb_fn[i] = omap_l4_io_entry[iotype].mem_write[0];
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omap_l4_io_writeh_fn[i] = omap_l4_io_entry[iotype].mem_write[1];
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omap_l4_io_writew_fn[i] = omap_l4_io_entry[iotype].mem_write[2];
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omap_l4_io_opaque[i] = omap_l4_io_entry[iotype].opaque; |
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} |
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#endif
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} |
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return base;
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} |