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Beginnings of IPC system. Totally untested.

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This commit is contained in:
marcan 2009-01-16 08:51:51 +01:00 committed by bushing
parent cc5b7ea98c
commit 3a258f2ed9
5 changed files with 298 additions and 37 deletions
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209
ipc.c
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@ -0,0 +1,209 @@
#include <stdarg.h>
#include "types.h"
#include "irq.h"
#include "memory.h"
#include "utils.h"
#include "hollywood.h"
#include "gecko.h"
#include "ipcstruct.h"
#include "ipc.h"
#define IPC_SLOW_SIZE 128
volatile ipc_request slow[IPC_SLOW_SIZE];
u16 slow_head;
vu16 slow_tail;
u16 in_head;
u16 out_tail;
static inline void poke_outtail(u16 num)
{
write16(HW_IPC_ARMMSG, num);
}
static inline void poke_inhead(u16 num)
{
write16(HW_IPC_ARMMSG+2, num);
}
static inline u16 peek_intail(void)
{
return read16(HW_IPC_PPCMSG);
}
static inline u16 peek_outhead(void)
{
return read16(HW_IPC_PPCMSG+2);
}
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/DoSed\n");
while(peek_outhead() == ((out_tail + 1)&(IPC_OUT_SIZE-1)));
}
ipc_out[out_tail].code = code;
ipc_out[out_tail].tag = tag;
if(num_args) {
va_start(ap, num_args);
while(num_args--) {
ipc_out[out_tail].args[arg++] = va_arg(ap, u32);
}
va_end(ap);
}
dc_flushrange((void*)&ipc_out[out_tail], 32);
out_tail = (out_tail+1)&(IPC_OUT_SIZE-1);
poke_outtail(out_tail);
write32(HW_IPC_ARMCTRL, IPC_CTRL_INT_RECV | IPC_CTRL_SEND);
irq_restore(cookie);
}
static int process_slow(volatile ipc_request *req)
{
gecko_printf("IPC: process slow @ %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]);
gecko_printf("IPC: unknown SLOW request %02x-%04x\n", req->device, req->req);
return 1;
}
static void process_in(void)
{
volatile ipc_request *req = &ipc_in[in_head];
gecko_printf("IPC: process in %d @ %p\n",in_head,req);
dc_invalidaterange((void*)req, 32);
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_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_head == ((slow_tail + 1)&(IPC_SLOW_SIZE-1))) {
gecko_printf("IPC: Slowqueue overrun\n");
panic(0x33);
}
slow[slow_tail] = *req;
slow_tail = (slow_tail+1)&(IPC_SLOW_SIZE-1);
}
}
void ipc_irq(void)
{
int donebell = 0;
gecko_printf("IPC: irq\n");
while(read32(HW_IPC_ARMCTRL) & IPC_CTRL_RECV) {
write32(HW_IPC_ARMCTRL, IPC_CTRL_INT_RECV | IPC_CTRL_RECV);
int donereq = 0;
while(peek_intail() != in_head) {
process_in();
in_head = (in_head+1)&(IPC_IN_SIZE-1);
poke_inhead(in_head);
donereq++;
}
if(!donereq)
gecko_printf("IPC bell but no reqs\n");
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_SENT|IPC_CTRL_RECV);
write32(HW_IPC_ARMCTRL, IPC_CTRL_SENT|IPC_CTRL_RECV);
slow_head = 0;
slow_tail = 0;
in_head = 0;
out_tail = 0;
irq_enable(IRQ_IPC);
write32(HW_IPC_ARMCTRL, IPC_CTRL_INT_RECV);
}
void ipc_shutdown(void)
{
irq_disable(IRQ_IPC);
}
void ipc_process_slow(void)
{
while(1) {
while(slow_head != slow_tail) {
if(!process_slow(&slow[slow_head]))
return;
slow_head = (slow_head+1)&(IPC_SLOW_SIZE-1);
}
u32 cookie = irq_kill();
if(slow_head == slow_tail)
irq_wait();
irq_restore(cookie);
}
}

51
ipc.h Normal file
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@ -0,0 +1,51 @@
#ifndef __IPC_H__
#define __IPC_H__
#include "types.h"
#define IPC_FAST 0x01
#define IPC_SLOW 0x00
#define IPC_DEV_SYS 0x00
#define IPC_SYS_JUMP 0x0000
#define IPC_SYS_WRITE32 0x0100
#define IPC_SYS_WRITE16 0x0101
#define IPC_SYS_WRITE8 0x0102
#define IPC_SYS_READ32 0x0103
#define IPC_SYS_READ16 0x0104
#define IPC_SYS_READ8 0x0105
#define IPC_SYS_SET32 0x0106
#define IPC_SYS_SET16 0x0107
#define IPC_SYS_SET8 0x0108
#define IPC_SYS_CLEAR32 0x0109
#define IPC_SYS_CLEAR16 0x010a
#define IPC_SYS_CLEAR8 0x010b
#define IPC_SYS_MASK32 0x010c
#define IPC_SYS_MASK16 0x010d
#define IPC_SYS_MASK8 0x010e
#define IPC_CODE (f,d,r) (((f)<<24)|((d)<<16)|(r))
typedef struct {
union {
struct {
u8 flags;
u8 device;
u16 req;
};
u32 code;
};
u32 tag;
u32 args[6];
} ipc_request;
void ipc_irq(void);
void ipc_initialize(void);
void ipc_shutdown(void);
void ipc_post(u32 code, u32 tag, u32 num_args, ...);
void ipc_process_slow(void);
#endif

5
ipcstruct.h
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@ -6,6 +6,11 @@
#ifndef _LANGUAGE_ASSEMBLY
#include "ipc.h"
extern volatile ipc_request ipc_in[IPC_IN_SIZE];
extern volatile ipc_request ipc_out[IPC_OUT_SIZE];
#endif
#endif

6
irq.c
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@ -2,6 +2,7 @@
#include "hollywood.h"
#include "gecko.h"
#include "utils.h"
#include "ipc.h"
void irq_setup_stack(void);
@ -60,12 +61,13 @@ void irq_handler(void)
write32(HW_IRQFLAG, IRQF_RESET);
}
if(flags & IRQF_IPC) {
gecko_printf("IRQ: IPC\n");
//gecko_printf("IRQ: IPC\n");
ipc_irq();
write32(HW_IRQFLAG, IRQF_IPC);
}
flags &= ~IRQF_ALL;
if(flags) {
gecko_printf("IRQ: unknown 0x%08x\n");
gecko_printf("IRQ: unknown 0x%08x\n", flags);
write32(HW_IRQFLAG, flags);
}
}

54
main.c
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@ -11,6 +11,9 @@
#include "panic.h"
#include "powerpc_elf.h"
#include "irq.h"
#include "ipc.h"
void *vector;
typedef struct {
u32 hdrsize;
@ -147,12 +150,7 @@ void *_main(void *base)
gecko_init();
gecko_puts("MiniIOS v0.1 loading\n");
fres = f_mount(0, &fatfs);
if(fres != FR_OK) {
gecko_printf("Error %d while trying to mount SD\n", fres);
panic2(0, PANIC_MOUNT);
}
irq_initialize();
irq_enable(IRQ_TIMER);
@ -160,15 +158,20 @@ void *_main(void *base)
irq_enable(IRQ_GPIO1B);
irq_enable(IRQ_GPIO1);
irq_enable(IRQ_RESET);
irq_enable(IRQ_IPC);
gecko_puts("Interrupts initialized\n");
gecko_puts("Trying to boot:" PPC_BOOT_FILE "\n");
gecko_puts("Initializing IPC...\n");
ipc_initialize();
write32(HW_IPC_PPCMSG, 0);
write32(HW_IPC_ARMMSG, 0);
write32(HW_IPC_PPCCTRL, IPC_CTRL_SENT|IPC_CTRL_RECV);
write32(HW_IPC_ARMCTRL, IPC_CTRL_SENT|IPC_CTRL_RECV);
gecko_puts("Mounting SD...\n");
fres = f_mount(0, &fatfs);
if(fres != FR_OK) {
gecko_printf("Error %d while trying to mount SD\n", fres);
panic2(0, PANIC_MOUNT);
}
gecko_puts("Trying to boot:" PPC_BOOT_FILE "\n");
res = powerpc_load_file(PPC_BOOT_FILE);
if(res < 0) {
@ -176,25 +179,16 @@ void *_main(void *base)
gecko_puts("Continuing anyway\n");
}
u32 tidh=0, tidl;
while(1) {
if(read32(HW_IPC_ARMCTRL) & IPC_CTRL_RECV) {
tidh = read32(HW_IPC_PPCMSG);
write32(HW_IPC_ARMCTRL, read32(HW_IPC_ARMCTRL) | IPC_CTRL_RECV);
}
if(read32(HW_IPC_ARMCTRL) & IPC_CTRL_SENT) {
tidl = read32(HW_IPC_PPCMSG);
write32(HW_IPC_ARMCTRL, read32(HW_IPC_ARMCTRL) | IPC_CTRL_SENT);
break;
}
}
void *bootmii = patch_boot2(base, (((u64)tidh)<<32) | tidl);
gecko_puts("Shutting down interrupts\n");
gecko_puts("Going into IPC mainloop...\n");
ipc_process_slow();
gecko_puts("IPC mainloop done!\n");
gecko_puts("Shutting down IPC...\n");
ipc_shutdown();
gecko_puts("Shutting down interrupts...\n");
irq_shutdown();
gecko_puts("Returning to BootMii...\n");
return bootmii;
//vector = patch_boot2(base, (((u64)tidh)<<32) | tidl);
gecko_printf("Vectoring to %p...\n",vector);
return vector;
}