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mini/ipc.c

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/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
inter-processor communications
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
Copyright (C) 2008, 2009 Haxx Enterprises <bushing@gmail.com>
Copyright (C) 2008, 2009 Sven Peter <svenpeter@gmail.com>
Copyright (C) 2009 Andre Heider "dhewg" <dhewg@wiibrew.org>
Copyright (C) 2009 John Kelley <wiidev@kelley.ca>
# 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
*/
#include <stdarg.h>
#include "string.h"
#include "types.h"
#include "irq.h"
#include "memory.h"
#include "utils.h"
#include "hollywood.h"
#include "gecko.h"
#include "ipc.h"
#include "nand.h"
#include "sdhc.h"
#include "sdmmc.h"
#include "crypto.h"
#include "boot2.h"
#include "powerpc.h"
#include "panic.h"
#define MINI_VERSION_MAJOR 1
#define MINI_VERSION_MINOR 3
static volatile ipc_request in_queue[IPC_IN_SIZE] ALIGNED(32) MEM2_BSS;
static volatile ipc_request out_queue[IPC_OUT_SIZE] ALIGNED(32) MEM2_BSS;
static volatile ipc_request slow_queue[IPC_SLOW_SIZE];
extern char __mem2_area_start[];
extern const char git_version[];
// These defines are for the ARMCTRL regs
// See http://wiibrew.org/wiki/Hardware/IPC
#define IPC_CTRL_Y1 0x01
#define IPC_CTRL_X2 0x02
#define IPC_CTRL_X1 0x04
#define IPC_CTRL_Y2 0x08
#define IPC_CTRL_IX1 0x10
#define IPC_CTRL_IX2 0x20
// Our definitions for this IPC interface
#define IPC_CTRL_OUT IPC_CTRL_Y1
#define IPC_CTRL_IN IPC_CTRL_X1
#define IPC_CTRL_IRQ_IN IPC_CTRL_IX1
// reset both flags (X* for ARM and Y* for PPC)
#define IPC_CTRL_RESET 0x06
const ipc_infohdr __ipc_info ALIGNED(32) MEM2_RODATA = {
.magic = "IPC",
.version = 1,
.mem2_boundary = __mem2_area_start,
.ipc_in = in_queue,
.ipc_in_size = IPC_IN_SIZE,
.ipc_out = out_queue,
.ipc_out_size = IPC_OUT_SIZE,
};
static u16 slow_queue_head;
static vu16 slow_queue_tail;
static u16 in_head;
static u16 out_tail;
static inline void poke_outtail(u16 num)
{
mask32(HW_IPC_ARMMSG, 0xFFFF, num);
}
static inline void poke_inhead(u16 num)
{
mask32(HW_IPC_ARMMSG, 0xFFFF0000, num<<16);
}
static inline u16 peek_intail(void)
{
return read32(HW_IPC_PPCMSG) & 0xFFFF;
}
static inline u16 peek_outhead(void)
{
return read32(HW_IPC_PPCMSG) >> 16;
}
void ipc_post(u32 code, u32 tag, u32 num_args, ...)
{
int arg = 0;
va_list ap;
u32 cookie = irq_kill();
if(peek_outhead() == ((out_tail + 1)&(IPC_OUT_SIZE-1))) {
gecko_printf("IPC: out queue full, PPC slow/dead/flooded\n");
while(peek_outhead() == ((out_tail + 1)&(IPC_OUT_SIZE-1)));
}
out_queue[out_tail].code = code;
out_queue[out_tail].tag = tag;
if(num_args) {
va_start(ap, num_args);
while(num_args--) {
out_queue[out_tail].args[arg++] = va_arg(ap, u32);
}
va_end(ap);
}
dc_flush_block_fast((void*)&out_queue[out_tail]);
out_tail = (out_tail+1)&(IPC_OUT_SIZE-1);
poke_outtail(out_tail);
write32(HW_IPC_ARMCTRL, IPC_CTRL_IRQ_IN | IPC_CTRL_OUT);
irq_restore(cookie);
}
void ipc_flush(void)
{
while(peek_outhead() != out_tail);
}
static u32 process_slow(volatile ipc_request *req)
{
//gecko_printf("IPC: process slow_queue @ %p\n",req);
//gecko_printf("IPC: req %08x %08x [%08x %08x %08x %08x %08x %08x]\n", req->code, req->tag,
// req->args[0], req->args[1], req->args[2], req->args[3], req->args[4], req->args[5]);
switch(req->device) {
case IPC_DEV_SYS:
switch(req->req) {
case IPC_SYS_PING: //PING can be both slow and fast for testing purposes
ipc_post(req->code, req->tag, 0);
break;
case IPC_SYS_JUMP:
return req->args[0];
case IPC_SYS_GETVERS:
ipc_post(req->code, req->tag, 1, MINI_VERSION_MAJOR << 16 | MINI_VERSION_MINOR);
break;
case IPC_SYS_GETGITS:
strlcpy((char *)req->args[0], git_version, 32);
dc_flushrange((void *)req->args[0], 32);
ipc_post(req->code, req->tag, 0);
break;
default:
gecko_printf("IPC: unknown SLOW SYS request %04x\n", req->req);
}
break;
case IPC_DEV_NAND:
nand_ipc(req);
break;
case IPC_DEV_SDHC:
sdhc_ipc(req);
break;
case IPC_DEV_SDMMC:
sdmmc_ipc(req);
break;
case IPC_DEV_KEYS:
crypto_ipc(req);
break;
case IPC_DEV_AES:
aes_ipc(req);
break;
case IPC_DEV_BOOT2:
return boot2_ipc(req);
break;
case IPC_DEV_PPC:
powerpc_ipc(req);
break;
default:
gecko_printf("IPC: unknown SLOW request %02x-%04x\n", req->device, req->req);
}
return 0;
}
void ipc_enqueue_slow(u8 device, u16 req, u32 num_args, ...)
{
int arg = 0;
va_list ap;
if(slow_queue_head == ((slow_queue_tail + 1)&(IPC_SLOW_SIZE-1))) {
gecko_printf("IPC: Slowqueue overrun\n");
panic2(0, PANIC_IPCOVF);
}
slow_queue[slow_queue_tail].flags = IPC_SLOW;
slow_queue[slow_queue_tail].device = device;
slow_queue[slow_queue_tail].req = req;
slow_queue[slow_queue_tail].tag = 0;
if(num_args) {
va_start(ap, num_args);
while(num_args--)
slow_queue[slow_queue_tail].args[arg++] = va_arg(ap, u32);
va_end(ap);
}
slow_queue_tail = (slow_queue_tail+1)&(IPC_SLOW_SIZE-1);
}
static void process_in(void)
{
volatile ipc_request *req = &in_queue[in_head];
//gecko_printf("IPC: process in %d @ %p\n",in_head,req);
dc_inval_block_fast((void*)req);
//gecko_printf("IPC: req %08x %08x [%08x %08x %08x %08x %08x %08x]\n", req->code, req->tag,
// req->args[0], req->args[1], req->args[2], req->args[3], req->args[4], req->args[5]);
if(req->flags & IPC_FAST) {
switch(req->device) {
case IPC_DEV_SYS:
// handle fast SYS requests here
switch(req->req) {
case IPC_SYS_PING:
ipc_post(req->code, req->tag, 0);
break;
case IPC_SYS_WRITE32:
write32(req->args[0], req->args[1]);
break;
case IPC_SYS_WRITE16:
write16(req->args[0], req->args[1]);
break;
case IPC_SYS_WRITE8:
write8(req->args[0], req->args[1]);
break;
case IPC_SYS_READ32:
ipc_post(req->code, req->tag, 1, read32(req->args[0]));
break;
case IPC_SYS_READ16:
ipc_post(req->code, req->tag, 1, read16(req->args[0]));
break;
case IPC_SYS_READ8:
ipc_post(req->code, req->tag, 1, read8(req->args[0]));
break;
case IPC_SYS_SET32:
set32(req->args[0], req->args[1]);
break;
case IPC_SYS_SET16:
set16(req->args[0], req->args[1]);
break;
case IPC_SYS_SET8:
set8(req->args[0], req->args[1]);
break;
case IPC_SYS_CLEAR32:
clear32(req->args[0], req->args[1]);
break;
case IPC_SYS_CLEAR16:
clear16(req->args[0], req->args[1]);
break;
case IPC_SYS_CLEAR8:
clear8(req->args[0], req->args[1]);
break;
case IPC_SYS_MASK32:
mask32(req->args[0], req->args[1], req->args[2]);
break;
case IPC_SYS_MASK16:
mask16(req->args[0], req->args[1], req->args[2]);
break;
case IPC_SYS_MASK8:
mask8(req->args[0], req->args[1], req->args[2]);
break;
default:
gecko_printf("IPC: unknown FAST SYS request %04x\n", req->req);
break;
}
break;
default:
gecko_printf("IPC: unknown FAST request %02x-%04x\n", req->device, req->req);
break;
}
} else {
if(slow_queue_head == ((slow_queue_tail + 1)&(IPC_SLOW_SIZE-1))) {
gecko_printf("IPC: Slowqueue overrun\n");
panic2(0, PANIC_IPCOVF);
}
slow_queue[slow_queue_tail] = *req;
slow_queue_tail = (slow_queue_tail+1)&(IPC_SLOW_SIZE-1);
}
}
void ipc_irq(void)
{
int donebell = 0;
while(read32(HW_IPC_ARMCTRL) & IPC_CTRL_IN) {
write32(HW_IPC_ARMCTRL, IPC_CTRL_IRQ_IN | IPC_CTRL_IN);
while(peek_intail() != in_head) {
process_in();
in_head = (in_head+1)&(IPC_IN_SIZE-1);
poke_inhead(in_head);
}
donebell++;
}
if(!donebell)
gecko_printf("IPC: IRQ but no bell!\n");
}
void ipc_initialize(void)
{
write32(HW_IPC_ARMMSG, 0);
write32(HW_IPC_PPCMSG, 0);
write32(HW_IPC_PPCCTRL, IPC_CTRL_RESET);
write32(HW_IPC_ARMCTRL, IPC_CTRL_RESET);
slow_queue_head = 0;
slow_queue_tail = 0;
in_head = 0;
out_tail = 0;
irq_enable(IRQ_IPC);
write32(HW_IPC_ARMCTRL, IPC_CTRL_IRQ_IN);
}
void ipc_shutdown(void)
{
// Don't kill message registers so our PPC side doesn't get confused
//write32(HW_IPC_ARMMSG, 0);
//write32(HW_IPC_PPCMSG, 0);
// Do kill flags so Nintendo's SDK doesn't get confused
write32(HW_IPC_PPCCTRL, IPC_CTRL_RESET);
write32(HW_IPC_ARMCTRL, IPC_CTRL_RESET);
irq_disable(IRQ_IPC);
}
u32 ipc_process_slow(void)
{
u32 vector = 0;
while (!vector) {
while (!vector && (slow_queue_head != slow_queue_tail)) {
vector = process_slow(&slow_queue[slow_queue_head]);
slow_queue_head = (slow_queue_head+1)&(IPC_SLOW_SIZE-1);
}
if (!vector)
{
gecko_process();
u32 cookie = irq_kill();
if(slow_queue_head == slow_queue_tail)
irq_wait();
irq_restore(cookie);
}
}
return vector;
}
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