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/*
* This file is part of the LinuxBIOS project.
*
* Copyright (C) 2000 AG Electronics Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "ppc.h"
#include "ppcreg.h"
#include "ppc74xx.h"
extern void ppc_init_float_registers(const double *);
/*RODATA static const double dummy_float = 1.0;*/
static const double dummy_float = 1.0;
#define HID0_DCACHE HID0_DCE
#define MSR_DATA MSR_DR
void ppc_setup_cpu(int icache)
{
int type = ppc_getpvr() >> 16;
int version = ppc_getpvr() & 0xffff;
if (type == 0xc)
{
if (version == 0x0200)
ppc_set1015(0x19000004);
else if (((version & 0xff00) == 0x0200) &&
(version != 0x0209))
ppc_set1015(0x01000000);
}
if (icache)
{
ppc_sethid0(HID0_NHR | HID0_BHT | HID0_ICE | HID0_ICFI
| HID0_BTIC | HID0_DCACHE);
ppc_sethid0(HID0_DPM | HID0_NHR | HID0_BHT | HID0_ICE
| HID0_BTIC | HID0_DCACHE);
}
else
{
ppc_sethid0(HID0_DPM | HID0_NHR | HID0_BHT | HID0_BTIC
| HID0_DCACHE);
}
#if 1
/* if (type == 8 || type == 12) */
{
ppc_setmsr(MSR_FP | MSR_DATA);
ppc_init_float_registers(&dummy_float);
}
#endif
}
void ppc_enable_dcache(void)
{
/*
* Already enabled in crt0.S
*/
#if 0
unsigned hid0 = ppc_gethid0();
ppc_sethid0(hid0 | HID0_DCFI | HID0_DCE);
ppc_sethid0(hid0 | HID0_DCE);
#endif
}
void ppc_disable_dcache(void)
{
unsigned hid0 = ppc_gethid0();
ppc_sethid0(hid0 & ~HID0_DCE);
}
void ppc_enable_mmu(void)
{
unsigned msr = ppc_getmsr();
ppc_setmsr(msr | MSR_DR | MSR_IR);
}
void make_coherent(void *base, unsigned length)
{
unsigned hid0 = ppc_gethid0();
if (hid0 & HID0_DCE)
{
unsigned i;
unsigned offset = 0x1f & (unsigned) base;
unsigned adjusted_base = (unsigned) base & ~0x1f;
for(i = 0; i < length + offset; i+= 32)
__asm__ volatile ("dcbf %1,%0" : : "r" (adjusted_base), "r" (i));
if (hid0 & HID0_ICE)
for(i = 0; i < length + offset; i+= 32)
__asm__ volatile ("icbi %1,%0" : : "r" (adjusted_base), "r" (i));
}
}
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