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/* |
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* Copyright (C) 2005 Anders Gavare. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: memory_ppc.c,v 1.3 2005/09/26 00:40:15 debug Exp $ |
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* |
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* Included from cpu_ppc.c. |
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*/ |
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|
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|
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/* |
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* ppc_translate_address(): |
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* |
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* Don't call this function is userland_emul is non-NULL, or cpu is NULL. |
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* |
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* Return values: |
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* 0 Failure |
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* 1 Success, the page is readable only |
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* 2 Success, the page is read/write |
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*/ |
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int ppc_translate_address(struct cpu *cpu, uint64_t vaddr, |
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uint64_t *return_addr, int flags) |
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{ |
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int instr = flags & FLAG_INSTR; |
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|
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if (cpu->cd.ppc.bits == 32) |
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vaddr &= 0xffffffff; |
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|
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if ((instr && !(cpu->cd.ppc.msr & PPC_MSR_IR)) || |
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(!instr && !(cpu->cd.ppc.msr & PPC_MSR_DR))) { |
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*return_addr = vaddr; |
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return 2; |
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} |
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|
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/* TODO: This is not really correct. */ |
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|
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if (cpu->cd.ppc.sdr1 == 0) { |
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/* Try the BATs: */ |
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int i; |
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/* TODO: This is just a quick (incorrect) hack: */ |
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for (i=0; i<4; i++) { |
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uint32_t p = 0, v = vaddr & 0xf0000000; |
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int match = 0; |
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if (instr && (cpu->cd.ppc.ibat_u[i]&0xf0000000) == v) { |
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match = 1; |
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p = cpu->cd.ppc.ibat_l[i] & 0xf0000000; |
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} |
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/* Linux/BeBox seems to use data bats for |
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instructions? */ |
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if (!match && (cpu->cd.ppc.dbat_u[i]&0xf0000000) == v) { |
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match = 1; |
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p = cpu->cd.ppc.dbat_l[i] & 0xf0000000; |
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} |
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if (match) { |
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*return_addr = (vaddr & 0x0fffffff) | p; |
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return 2; |
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} |
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} |
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|
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fatal("ppc_translate_address(): vaddr = 0x%016llx, no ", |
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"BAT hit?\n", (long long)vaddr); |
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*return_addr = vaddr; |
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return 2; |
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} |
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|
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/* Return failure: */ |
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if (flags & FLAG_NOEXCEPTIONS) |
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return 0; |
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|
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/* TODO: Cause exception. */ |
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fatal("TODO: exception! sdr1 = 0x%llx\n", (long long)cpu->cd.ppc.sdr1); |
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*return_addr = vaddr; |
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return 2; |
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|
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return 0; |
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} |
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