mini/powerpc.c

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/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
PowerPC support code
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Copyright (C) 2008, 2009 Sven Peter <svenpeter@gmail.com>
Copyright (C) 2009 Andre Heider "dhewg" <dhewg@wiibrew.org>
Copyright (C) 2010 Alex Marshall <trap15@raidenii.net>
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# This code is licensed to you under the terms of the GNU GPL, version 2;
# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
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*/
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#include "types.h"
#include "memory.h"
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#include "powerpc.h"
#include "powerpc_elf.h"
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#include "hollywood.h"
#include "utils.h"
#include "string.h"
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#include "start.h"
#include "gecko.h"
void powerpc_upload_stub(u32 entry)
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{
u32 i;
set32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
// lis r3, entry@h
write32(EXI_BOOT_BASE + 4 * 0, 0x3c600000 | entry >> 16);
// ori r3, r3, entry@l
write32(EXI_BOOT_BASE + 4 * 1, 0x60630000 | (entry & 0xffff));
// mtsrr0 r3
write32(EXI_BOOT_BASE + 4 * 2, 0x7c7a03a6);
// li r3, 0
write32(EXI_BOOT_BASE + 4 * 3, 0x38600000);
// mtsrr1 r3
write32(EXI_BOOT_BASE + 4 * 4, 0x7c7b03a6);
// rfi
write32(EXI_BOOT_BASE + 4 * 5, 0x4c000064);
for (i = 6; i < 0x10; ++i)
write32(EXI_BOOT_BASE + 4 * i, 0);
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set32(HW_DIFLAGS, DIFLAGS_BOOT_CODE);
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set32(HW_AHBPROT, 0xFFFFFFFF);
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gecko_printf("disabling EXI now...\n");
clear32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
}
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void powerpc_hang(void)
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{
clear32(HW_RESETS, 0x30);
udelay(100);
set32(HW_RESETS, 0x20);
udelay(100);
}
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void powerpc_reset(void)
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{
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// enable the broadway IPC interrupt
write32(HW_PPCIRQMASK, (1<<30));
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clear32(HW_RESETS, 0x30);
udelay(100);
set32(HW_RESETS, 0x20);
udelay(100);
set32(HW_RESETS, 0x10);
udelay(100000);
set32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
}
void powerpc_ipc(volatile ipc_request *req)
{
switch (req->req) {
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case IPC_PPC_BOOT:
if (req->args[0]) {
// Enqueued from ARM side, do not invalidate mem nor ipc_post
powerpc_boot_mem((u8 *) req->args[1], req->args[2]);
} else {
dc_invalidaterange((void *) req->args[1], req->args[2]);
int res = powerpc_boot_mem((u8 *) req->args[1], req->args[2]);
if (res)
ipc_post(req->code, req->tag, 1, res);
}
break;
case IPC_PPC_BOOT_FILE:
if (req->args[0]) {
// Enqueued from ARM side, do not invalidate mem nor ipc_post
powerpc_boot_file((char *) req->args[1]);
} else {
dc_invalidaterange((void *) req->args[1],
strnlen((char *) req->args[1], 256));
int res = powerpc_boot_file((char *) req->args[1]);
if (res)
ipc_post(req->code, req->tag, 1, res);
}
break;
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default:
gecko_printf("IPC: unknown SLOW PPC request %04X\n", req->req);
}
}