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/*
* Creation Date: <2004/08/28 18:38:22 greg>
* Time-stamp: <2004/08/28 18:38:22 greg>
*
* <methods.c>
*
* Misc device node methods
*
* Copyright (C) 2004 Greg Watson
*
* Based on MOL specific code which is
*
* Copyright (C) 2003, 2004 Samuel Rydh (samuel@ibrium.se)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2
*
*/
#include "config.h"
#include "libopenbios/bindings.h"
#include "libc/string.h"
#include "pearpc/pearpc.h"
#include "libopenbios/ofmem.h"
/************************************************************************/
/* RTAS (run-time abstraction services) */
/************************************************************************/
#ifdef CONFIG_RTAS
DECLARE_NODE( rtas, INSTALL_OPEN, 0, "+/rtas" );
/* ( physbase -- rtas_callback ) */
static void
rtas_instantiate( void )
{
int physbase = POP();
int s=0x1000, size = (int)of_rtas_end - (int)of_rtas_start;
unsigned long virt;
while( s < size )
s += 0x1000;
virt = ofmem_claim_virt( 0, s, 0x1000 );
ofmem_map( physbase, virt, s, -1 );
memcpy( (char*)virt, of_rtas_start, size );
printk("RTAS instantiated at %08x\n", physbase );
flush_icache_range( (char*)virt, (char*)virt + size );
PUSH( physbase );
}
NODE_METHODS( rtas ) = {
{ "instantiate", rtas_instantiate },
{ "instantiate-rtas", rtas_instantiate },
};
#endif
/************************************************************************/
/* stdout */
/************************************************************************/
DECLARE_NODE( video_stdout, INSTALL_OPEN, 0, "Tdisplay" );
/* ( addr len -- actual ) */
static void
stdout_write( void )
{
int len = POP();
char *addr = (char*)POP();
printk( "%s", s );
//vfd_draw_str( s );
console_draw_fstr(addr, len);
PUSH( len );
}
NODE_METHODS( video_stdout ) = {
{ "write", stdout_write },
};
/************************************************************************/
/* tty */
/************************************************************************/
DECLARE_NODE( tty, INSTALL_OPEN, 0, "/packages/terminal-emulator" );
/* ( addr len -- actual ) */
static void
tty_read( void )
{
int ch, len = POP();
char *p = (char*)POP();
int ret=0;
if( len > 0 ) {
ret = 1;
ch = getchar();
if( ch >= 0 ) {
*p = ch;
} else {
ret = 0;
}
}
PUSH( ret );
}
/* ( addr len -- actual ) */
static void
tty_write( void )
{
int i, len = POP();
char *p = (char*)POP();
for( i=0; i<len; i++ )
putchar( *p++ );
RET( len );
}
NODE_METHODS( tty ) = {
{ "read", tty_read },
{ "write", tty_write },
};
/************************************************************************/
/* client interface 'quiesce' */
/************************************************************************/
DECLARE_NODE( ciface, 0, 0, "/packages/client-iface" );
/* ( -- ) */
static void
ciface_quiesce( unsigned long args[], unsigned long ret[] )
{
#if 0
unsigned long msr;
/* This seems to be the correct thing to do - but I'm not sure */
asm volatile("mfmsr %0" : "=r" (msr) : );
msr &= ~(MSR_IR | MSR_DR);
asm volatile("mtmsr %0" :: "r" (msr) );
#endif
printk("=============================================================\n\n");
}
/* ( -- ms ) */
static void
ciface_milliseconds( unsigned long args[], unsigned long ret[] )
{
extern unsigned long get_timer_freq();
static unsigned long mticks=0, usecs=0;
unsigned long t;
asm volatile("mftb %0" : "=r" (t) : );
if( mticks )
usecs += get_timer_freq() / 1000000 * ( t-mticks );
mticks = t;
PUSH( usecs/1000 );
}
NODE_METHODS( ciface ) = {
{ "quiesce", ciface_quiesce },
{ "milliseconds", ciface_milliseconds },
};
/************************************************************************/
/* MMU/memory methods */
/************************************************************************/
DECLARE_NODE( memory, INSTALL_OPEN, 0, "/memory" );
DECLARE_NODE( mmu, INSTALL_OPEN, 0, "/cpu@0" );
DECLARE_NODE( mmu_ciface, 0, 0, "/packages/client-iface" );
/* ( phys size align --- base ) */
static void
mem_claim( void )
{
ucell align = POP();
ucell size = POP();
ucell phys = POP();
ucell ret = ofmem_claim_phys( phys, size, align );
if( ret == (ucell)-1 ) {
printk("MEM: claim failure\n");
throw( -13 );
return;
}
PUSH( ret );
}
/* ( phys size --- ) */
static void
mem_release( void )
{
POP(); POP();
}
/* ( phys size align --- base ) */
static void
mmu_claim( void )
{
ucell align = POP();
ucell size = POP();
ucell phys = POP();
ucell ret = ofmem_claim_virt( phys, size, align );
if( ret == -1 ) {
printk("MMU: CLAIM failure\n");
throw( -13 );
return;
}
PUSH( ret );
}
/* ( phys size --- ) */
static void
mmu_release( void )
{
POP(); POP();
}
/* ( phys virt size mode -- [ret???] ) */
static void
mmu_map( void )
{
ucell mode = POP();
ucell size = POP();
ucell virt = POP();
ucell phys = POP();
ucell ret;
/* printk("mmu_map: %x %x %x %x\n", phys, virt, size, mode ); */
ret = ofmem_map( phys, virt, size, mode );
if( ret ) {
printk("MMU: map failure\n");
throw( -13 );
return;
}
}
/* ( virt size -- ) */
static void
mmu_unmap( void )
{
POP(); POP();
}
/* ( virt -- false | phys mode true ) */
static void
mmu_translate( void )
{
ucell mode;
ucell virt = POP();
ucell phys = ofmem_translate( virt, &mode );
if( phys == -1 ) {
PUSH( 0 );
} else {
PUSH( phys );
PUSH( mode );
PUSH( -1 );
}
}
/* ( virt size align -- baseaddr|-1 ) */
static void
ciface_claim( void )
{
ucell align = POP();
ucell size = POP();
ucell virt = POP();
ucell ret = ofmem_claim( virt, size, align );
/* printk("ciface_claim: %08x %08x %x\n", virt, size, align ); */
PUSH( ret );
}
/* ( virt size -- ) */
static void
ciface_release( void )
{
POP();
POP();
}
NODE_METHODS( memory ) = {
{ "claim", mem_claim },
{ "release", mem_release },
};
NODE_METHODS( mmu ) = {
{ "claim", mmu_claim },
{ "release", mmu_release },
{ "map", mmu_map },
{ "unmap", mmu_unmap },
{ "translate", mmu_translate },
};
NODE_METHODS( mmu_ciface ) = {
{ "cif-claim", ciface_claim },
{ "cif-release", ciface_release },
};
/************************************************************************/
/* init */
/************************************************************************/
void
node_methods_init( void )
{
#ifdef CONFIG_RTAS
REGISTER_NODE( rtas );
#endif
REGISTER_NODE( video_stdout );
REGISTER_NODE( ciface );
REGISTER_NODE( memory );
REGISTER_NODE( mmu );
REGISTER_NODE( mmu_ciface );
REGISTER_NODE( tty );
}
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