Thu Jul 30 03:57:52 2020 UTC ()
Code to dump PMB contents.
(uwe)
diff -r0 -r1.1 src/sys/arch/sh3/sh3/pmb.c
/* $NetBSD: pmb.c,v 1.1 2020/07/30 03:57:52 uwe Exp $ */
/*
* Copyright (c) 2020 Valery Ushakov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmb.c,v 1.1 2020/07/30 03:57:52 uwe Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sh3/devreg.h>
#include <sh3/mmu_sh4.h>
#include <sh3/pmb.h>
void
st40_pmb_init(int product)
{
int se_mode;
bool have_ub;
uint8_t ub;
char bits[64];
switch (product) {
/* ST40-300 */
case CPU_PRODUCT_STX7105: {
uint32_t pascr = _reg_read_4(ST40_PASCR);
snprintb(bits, sizeof(bits), ST40_PASCR_BITS, pascr);
printf("PMB: PASCR=%s\n", bits);
se_mode = (pascr & ST40_PASCR_SE);
have_ub = true;
ub = (uint8_t)(pascr & ST40_PASCR_UB_MASK);
break;
}
#if 0
/* ST40-200, ST40-500 */
case 0xdeadbabe: {
uint32_t mmucr = _reg_read_4(SH4_MMUCR);
se_mode = (mmucr & ST40_MMUCR_SE);
have_ub = false;
ub = 0;
break;
}
#endif
/* No PMB */
default:
return;
}
if (!se_mode) {
printf("PMB: 29-bit mode\n");
if (have_ub) {
for (int area = 0; area < 8; ++area) {
bool unbuffered = !!(ub & (1u << area));
printf("PMB: area%d %s\n", area,
unbuffered ? "UNBUFFERED" : "buffered");
}
}
return;
}
printf("PMB: 32-bit mode\n");
for (unsigned int i = 0; i < ST40_PMB_ENTRY; ++i) {
uint32_t offset = (i << ST40_PMB_E_SHIFT);
uint32_t addr = _reg_read_4(ST40_PMB_AA + offset);
#if 0
snprintb(bits, sizeof(bits), ST40_PMB_AA_BITS, addr);
printf("PMB[%02d] A=%s", i, bits);
#endif
uint32_t data = _reg_read_4(ST40_PMB_DA + offset);
#if 0
snprintb(bits, sizeof(bits), ST40_PMB_DA_BITS, data);
printf(" D=%s\n", bits);
#endif
if ((addr & ST40_PMB_AA_V) == 0)
continue;
uint32_t vpn = addr & ST40_PMB_AA_VPN_MASK;
uint32_t ppn = data & ST40_PMB_DA_PPN_MASK;
uint32_t szbits = data & ST40_PMB_DA_SZ_MASK;
vpn >>= ST40_PMB_AA_VPN_SHIFT;
ppn >>= ST40_PMB_DA_PPN_SHIFT;
unsigned int sz = 0;
switch (szbits) {
case ST40_PMB_DA_SZ_16M:
sz = 1;
break;
case ST40_PMB_DA_SZ_64M:
sz = 4;
break;
case ST40_PMB_DA_SZ_128M:
sz = 8;
break;
case ST40_PMB_DA_SZ_512M:
sz = 32;
break;
}
printf("PMB[%02d] = %02x..%02x -> %02x..%02x"
" %3uM %s %s %s\n",
i,
vpn, vpn + sz - 1,
ppn, ppn + sz - 1,
sz << 4,
data & ST40_PMB_DA_UB ? "UB" : "--",
data & ST40_PMB_DA_C ? "C" : "-",
data & ST40_PMB_DA_WT ? "WT" : "CB");
}
}