/* $NetBSD: oea_machdep.c,v 1.85 2024/01/20 00:18:19 jmcneill Exp $ */
/*
* Copyright (C) 2002 Matt Thomas
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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: oea_machdep.c,v 1.85 2024/01/20 00:18:19 jmcneill Exp $");
#ifdef _KERNEL_OPT
#include "opt_altivec.h"
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "opt_multiprocessor.h"
#include "opt_ppcarch.h"
#endif
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/boot_flag.h>
#include <sys/exec.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/mount.h>
#include <sys/msgbuf.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/syscallargs.h>
#include <sys/syslog.h>
#include <sys/systm.h>
#include <sys/cpu.h>
#include <uvm/uvm_extern.h>
#ifdef DDB
#include <powerpc/db_machdep.h>
#include <ddb/db_extern.h>
#endif
#ifdef KGDB
#include <sys/kgdb.h>
#endif
#include <machine/powerpc.h>
#include <powerpc/trap.h>
#include <powerpc/spr.h>
#include <powerpc/pte.h>
#include <powerpc/altivec.h>
#include <powerpc/pcb.h>
#include <powerpc/oea/bat.h>
#include <powerpc/oea/cpufeat.h>
#include <powerpc/oea/spr.h>
#include <powerpc/oea/sr_601.h>
char machine[] = MACHINE; /* from <machine/param.h> */
char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */
struct vm_map *phys_map = NULL;
/*
* Global variables used here and there
*/
static void trap0(void *);
/* XXXSL: The battable is not initialized to non-zero for PPC_OEA64 and PPC_OEA64_BRIDGE */
struct bat battable[BAT_VA2IDX(0xffffffff)+1];
register_t iosrtable[16]; /* I/O segments, for kernel_pmap setup */
#ifndef MSGBUFADDR
paddr_t msgbuf_paddr;
#endif
extern int dsitrap_fix_dbat4[];
extern int dsitrap_fix_dbat5[];
extern int dsitrap_fix_dbat6[];
extern int dsitrap_fix_dbat7[];
/*
* Load pointer with 0 behind GCC's back, otherwise it will
* emit a "trap" instead.
*/
static __inline__ uintptr_t
zero_value(void)
{
uintptr_t dont_tell_gcc;
__asm volatile ("li %0, 0" : "=r"(dont_tell_gcc) :);
return dont_tell_gcc;
}
void
oea_init(void (*handler)(void))
{
extern int trapcode[], trapsize[];
extern int sctrap[], scsize[];
extern int alitrap[], alisize[];
extern int dsitrap[], dsisize[];
extern int trapstart[], trapend[];
#ifdef PPC_OEA601
extern int dsi601trap[], dsi601size[];
#endif
extern int decrint[], decrsize[];
extern int tlbimiss[], tlbimsize[];
extern int tlbdlmiss[], tlbdlmsize[];
extern int tlbdsmiss[], tlbdsmsize[];
#if defined(DDB) || defined(KGDB)
extern int ddblow[], ddbsize[];
#endif
#ifdef ALTIVEC
register_t msr;
#endif
uintptr_t exc, exc_base;
#if defined(ALTIVEC) || defined(PPC_OEA)
register_t scratch;
#endif
unsigned int cpuvers;
size_t size;
struct cpu_info * const ci = &cpu_info[0];
#ifdef PPC_HIGH_VEC
exc_base = EXC_HIGHVEC;
#else
exc_base = zero_value();
#endif
KASSERT(mfspr(SPR_SPRG0) == (uintptr_t)ci);
#if defined (PPC_OEA64_BRIDGE) && defined (PPC_OEA)
if (oeacpufeat & OEACPU_64_BRIDGE)
pmap_setup64bridge();
else
pmap_setup32();
#endif
cpuvers = mfpvr() >> 16;
/*
* Initialize proc0 and current pcb and pmap pointers.
*/
(void) ci;
KASSERT(ci != NULL);
KASSERT(curcpu() == ci);
KASSERT(lwp0.l_cpu == ci);
curpcb = lwp_getpcb(&lwp0);
memset(curpcb, 0, sizeof(struct pcb));
#ifdef ALTIVEC
/*
* Initialize the vectors with NaNs
*/
for (scratch = 0; scratch < 32; scratch++) {
curpcb->pcb_vr.vreg[scratch][0] = 0x7FFFDEAD;
curpcb->pcb_vr.vreg[scratch][1] = 0x7FFFDEAD;
curpcb->pcb_vr.vreg[scratch][2] = 0x7FFFDEAD;
curpcb->pcb_vr.vreg[scratch][3] = 0x7FFFDEAD;
}
#endif
curpm = curpcb->pcb_pm = pmap_kernel();
/*
* Cause a PGM trap if we branch to 0.
*
* XXX GCC4.1 complains about memset on address zero, so
* don't use the builtin.
*/
#undef memset
memset(0, 0, 0x100);
/*
* Set up trap vectors. Don't assume vectors are on 0x100.
*/
for (exc = exc_base; exc <= exc_base + EXC_LAST; exc += 0x100) {
switch (exc - exc_base) {
default:
size = (size_t)trapsize;
memcpy((void *)exc, trapcode, size);
break;
#if 0
case EXC_EXI:
/*
* This one is (potentially) installed during autoconf
*/
break;
#endif
case EXC_SC:
size = (size_t)scsize;
memcpy((void *)exc, sctrap, size);
break;
case EXC_ALI:
size = (size_t)alisize;
memcpy((void *)exc, alitrap, size);
break;
case EXC_DSI:
#ifdef PPC_OEA601
if (cpuvers == MPC601) {
size = (size_t)dsi601size;
memcpy((void *)exc, dsi601trap, size);
break;
} else
#endif /* PPC_OEA601 */
if (oeacpufeat & OEACPU_NOBAT) {
size = (size_t)alisize;
memcpy((void *)exc, alitrap, size);
} else {
size = (size_t)dsisize;
memcpy((void *)exc, dsitrap, size);
}
break;
case EXC_DECR:
size = (size_t)decrsize;
memcpy((void *)exc, decrint, size);
break;
case EXC_IMISS:
size = (size_t)tlbimsize;
memcpy((void *)exc, tlbimiss, size);
break;
case EXC_DLMISS:
size = (size_t)tlbdlmsize;
memcpy((void *)exc, tlbdlmiss, size);
break;
case EXC_DSMISS:
size = (size_t)tlbdsmsize;
memcpy((void *)exc, tlbdsmiss, size);
break;
case EXC_PERF:
size = (size_t)trapsize;
memcpy((void *)exc, trapcode, size);
memcpy((void *)(exc_base + EXC_VEC), trapcode, size);
break;
#if defined(DDB) || defined(KGDB)
case EXC_RUNMODETRC:
#ifdef PPC_OEA601
if (cpuvers != MPC601)
#endif
{
size = (size_t)trapsize;
memcpy((void *)exc, trapcode, size);
break;
}
/* FALLTHROUGH */
case EXC_PGM:
case EXC_TRC:
case EXC_BPT:
size = (size_t)ddbsize;
memcpy((void *)exc, ddblow, size);
break;
#endif /* DDB || KGDB */
}
#if 0
exc += roundup(size, 32);
#endif
}
/*
* Install a branch absolute to trap0 to force a panic.
*/
if ((uintptr_t)trap0 < 0x2000000) {
uint32_t *p = (uint32_t *)zero_value();
p[0] = 0x7c6802a6;
p[1] = 0x48000002 | (uintptr_t) trap0;
}
/*
* Get the cache sizes because install_extint calls __syncicache.
*/
cpu_probe_cache();
#define MxSPR_MASK 0x7c1fffff
#define MFSPR_MQ 0x7c0002a6
#define MTSPR_MQ 0x7c0003a6
#define MTSPR_IBAT0L 0x7c1183a6
#define MTSPR_IBAT1L 0x7c1383a6
#define NOP 0x60000000
#define B 0x48000000
#define TLBSYNC 0x7c00046c
#define SYNC 0x7c0004ac
#ifdef PPC_OEA64_BRIDGE
#define MFMSR_MASK 0xfc1fffff
#define MFMSR 0x7c0000a6
#define MTMSRD_MASK 0xfc1effff
#define MTMSRD 0x7c000164
#define RLDICL_MASK 0xfc00001c
#define RLDICL 0x78000000
#define RFID 0x4c000024
#define RFI 0x4c000064
#endif
#ifdef ALTIVEC
#define MFSPR_VRSAVE 0x7c0042a6
#define MTSPR_VRSAVE 0x7c0043a6
/*
* Try to set the VEC bit in the MSR. If it doesn't get set, we are
* not on a AltiVec capable processor.
*/
__asm volatile (
"mfmsr %0; oris %1,%0,%2@h; mtmsr %1; isync; "
"mfmsr %1; mtmsr %0; isync"
: "=r"(msr), "=r"(scratch)
: "J"(PSL_VEC));
/*
* If we aren't on an AltiVec capable processor, we need to zap any of
* the sequences we save/restore the VRSAVE SPR into NOPs.
*/
if (scratch & PSL_VEC) {
cpu_altivec = 1;
} else {
for (int *ip = trapstart; ip < trapend; ip++) {
if ((ip[0] & MxSPR_MASK) == MFSPR_VRSAVE) {
ip[0] = NOP; /* mfspr */
ip[1] = NOP; /* stw */
} else if ((ip[0] & MxSPR_MASK) == MTSPR_VRSAVE) {
ip[-1] = NOP; /* lwz */
ip[0] = NOP; /* mtspr */
}
}
}
#endif
/* XXX It would seem like this code could be elided ifndef 601, but
* doing so breaks my power3 machine.
*/
/*
* If we aren't on a MPC601 processor, we need to zap any of the
* sequences we save/restore the MQ SPR into NOPs, and skip over the
* sequences where we zap/restore BAT registers on kernel exit/entry.
*/
if (cpuvers != MPC601) {
for (int *ip = trapstart; ip < trapend; ip++) {
if ((ip[0] & MxSPR_MASK) == MFSPR_MQ) {
ip[0] = NOP; /* mfspr */
ip[1] = NOP; /* stw */
} else if ((ip[0] & MxSPR_MASK) == MTSPR_MQ) {
ip[-1] = NOP; /* lwz */
ip[0] = NOP; /* mtspr */
} else if ((ip[0] & MxSPR_MASK) == MTSPR_IBAT0L) {
if ((ip[1] & MxSPR_MASK) == MTSPR_IBAT1L)
ip[-1] = B | 0x14; /* li */
else
ip[-4] = B | 0x24; /* lis */
}
}
}
#ifdef PPC_OEA64_BRIDGE
if ((oeacpufeat & OEACPU_64_BRIDGE) == 0) {
for (int *ip = (int *)exc_base;
(uintptr_t)ip <= exc_base + EXC_LAST;
ip++) {
if ((ip[0] & MFMSR_MASK) == MFMSR
&& (ip[1] & RLDICL_MASK) == RLDICL
&& (ip[2] & MTMSRD_MASK) == MTMSRD) {
*ip++ = NOP;
*ip++ = NOP;
ip[0] = NOP;
} else if (*ip == RFID) {
*ip = RFI;
}
}
/*
* Now replace each rfid instruction with a rfi instruction.
*/
for (int *ip = trapstart; ip < trapend; ip++) {
if ((ip[0] & MFMSR_MASK) == MFMSR
&& (ip[1] & RLDICL_MASK) == RLDICL
&& (ip[2] & MTMSRD_MASK) == MTMSRD) {
*ip++ = NOP;
*ip++ = NOP;
ip[0] = NOP;
} else if (*ip == RFID) {
*ip = RFI;
}
}
}
#endif /* PPC_OEA64_BRIDGE */
/*
* Sync the changed instructions.
*/
__syncicache((void *) trapstart,
(uintptr_t) trapend - (uintptr_t) trapstart);
__syncicache(dsitrap_fix_dbat4, 16);
__syncicache(dsitrap_fix_dbat7, 8);
#ifdef PPC_OEA601
/*
* If we are on a MPC601 processor, we need to zap any tlbsync
* instructions into sync. This differs from the above in
* examining all kernel text, as opposed to just the exception handling.
* We sync the icache on every instruction found since there are
* only very few of them.
*/
if (cpuvers == MPC601) {
extern int kernel_text[], etext[];
int *ip;
for (ip = kernel_text; ip < etext; ip++) {
if (*ip == TLBSYNC) {
*ip = SYNC;
__syncicache(ip, sizeof(*ip));
}
}
}
#endif /* PPC_OEA601 */
/*
* Configure a PSL user mask matching this processor.
* Don't allow to set PSL_FP/PSL_VEC, since that will affect PCU.
*/
cpu_psluserset = PSL_EE | PSL_PR | PSL_ME | PSL_IR | PSL_DR | PSL_RI;
cpu_pslusermod = PSL_FE0 | PSL_FE1 | PSL_LE | PSL_SE | PSL_BE;
#ifdef PPC_OEA601
if (cpuvers == MPC601) {
cpu_psluserset &= PSL_601_MASK;
cpu_pslusermod &= PSL_601_MASK;
}
#endif
#ifdef PPC_HIGH_VEC
cpu_psluserset |= PSL_IP; /* XXX ok? */
#endif
/*
* external interrupt handler install
*/
if (handler)
oea_install_extint(handler);
__syncicache((void *)exc_base, EXC_LAST + 0x100);
/*
* Now enable translation (and machine checks/recoverable interrupts).
*/
#ifdef PPC_OEA
__asm volatile ("sync; mfmsr %0; ori %0,%0,%1; mtmsr %0; isync"
: "=r"(scratch)
: "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI));
#endif
/*
* Let's take all the indirect calls via our stubs and patch
* them to be direct calls.
*/
cpu_fixup_stubs();
KASSERT(curcpu() == ci);
}
#ifdef PPC_OEA601
static void
mpc601_ioseg_add(paddr_t pa, register_t len)
{
const u_int i = pa >> ADDR_SR_SHFT;
if (len != BAT_BL_256M)
panic("mpc601_ioseg_add: len != 256M");
/*
* Translate into an I/O segment, load it, and stash away for use
* in pmap_bootstrap().
*/
iosrtable[i] = SR601(SR601_Ks, SR601_BUID_MEMFORCED, 0, i);
/*
* XXX Setting segment register 0xf on my powermac 7200
* wedges machine so set later in pmap.c
*/
/*
__asm volatile ("mtsrin %0,%1"
:: "r"(iosrtable[i]),
"r"(pa));
*/
}
#endif /* PPC_OEA601 */
#if defined (PPC_OEA) || defined (PPC_OEA64_BRIDGE)
#define DBAT_SET(n, batl, batu) \
do { \
mtspr(SPR_DBAT##n##L, (batl)); \
mtspr(SPR_DBAT##n##U, (batu)); \
} while (/*CONSTCOND*/ 0)
#define DBAT_RESET(n) DBAT_SET(n, 0, 0)
#define DBATU_GET(n) mfspr(SPR_DBAT##n##U)
#define IBAT_SET(n, batl, batu) \
do { \
mtspr(SPR_IBAT##n##L, (batl)); \
mtspr(SPR_IBAT##n##U, (batu)); \
} while (/*CONSTCOND*/ 0)
#define IBAT_RESET(n) IBAT_SET(n, 0, 0)
void
oea_iobat_add(paddr_t pa, register_t len)
{
static int z = 1;
const u_int n = BAT_BL_TO_SIZE(len) / BAT_BL_TO_SIZE(BAT_BL_8M);
const u_int i = BAT_VA2IDX(pa) & -n; /* in case pa was in the middle */
const int after_bat3 = (oeacpufeat & OEACPU_HIGHBAT) ? 4 : 8;
KASSERT(len >= BAT_BL_8M);
#ifdef PPC_OEA601
if (mfpvr() >> 16 == MPC601) {
/* Use I/O segments on the BAT-starved 601. */
mpc601_ioseg_add(pa, len);
return;
}
#endif /* PPC_OEA601 */
/*
* If the caller wanted a bigger BAT than the hardware supports,
* split it into smaller BATs.
*/
if (len > BAT_BL_256M && (oeacpufeat & OEACPU_XBSEN) == 0) {
u_int xn = BAT_BL_TO_SIZE(len) >> 28;
while (xn-- > 0) {
oea_iobat_add(pa, BAT_BL_256M);
pa += 0x10000000;
}
return;
}
const register_t batl = BATL(pa, BAT_I|BAT_G, BAT_PP_RW);
const register_t batu = BATU(pa, len, BAT_Vs);
for (u_int j = 0; j < n; j++) {
battable[i + j].batl = batl;
battable[i + j].batu = batu;
}
/*
* Let's start loading the BAT registers.
*/
switch (z) {
case 1:
DBAT_SET(1, batl, batu);
z = 2;
break;
case 2:
DBAT_SET(2, batl, batu);
z = 3;
break;
case 3:
DBAT_SET(3, batl, batu);
z = after_bat3; /* no highbat, skip to end */
break;
case 4:
DBAT_SET(4, batl, batu);
z = 5;
break;
case 5:
DBAT_SET(5, batl, batu);
z = 6;
break;
case 6:
DBAT_SET(6, batl, batu);
z = 7;
break;
case 7:
DBAT_SET(7, batl, batu);
z = 8;
break;
default:
break;
}
}
void
oea_iobat_remove(paddr_t pa)
{
const u_int i = BAT_VA2IDX(pa);
if (!BAT_VA_MATCH_P(battable[i].batu, pa) ||
!BAT_VALID_P(battable[i].batu, PSL_PR))
return;
const int n =
__SHIFTOUT(battable[i].batu, (BAT_XBL|BAT_BL) & ~BAT_BL_8M) + 1;
KASSERT((n & (n-1)) == 0); /* power of 2 */
KASSERT((i & (n-1)) == 0); /* multiple of n */
memset(&battable[i], 0, n*sizeof(battable[0]));
const int maxbat = oeacpufeat & OEACPU_HIGHBAT ? 8 : 4;
for (u_int k = 1 ; k < maxbat; k++) {
register_t batu;
switch (k) {
case 1:
batu = DBATU_GET(1);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(1);
break;
case 2:
batu = DBATU_GET(2);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(2);
break;
case 3:
batu = DBATU_GET(3);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(3);
break;
case 4:
batu = DBATU_GET(4);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(4);
break;
case 5:
batu = DBATU_GET(5);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(5);
break;
case 6:
batu = DBATU_GET(6);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(6);
break;
case 7:
batu = DBATU_GET(7);
if (BAT_VA_MATCH_P(batu, pa) &&
BAT_VALID_P(batu, PSL_PR))
DBAT_RESET(7);
break;
default:
break;
}
}
}
void
oea_batinit(paddr_t pa, ...)
{
struct mem_region *allmem, *availmem, *mp;
register_t msr = mfmsr();
va_list ap;
#ifdef PPC_OEA601
unsigned int cpuvers;
cpuvers = mfpvr() >> 16;
#endif /* PPC_OEA601 */
/*
* we need to call this before zapping BATs so OF calls work
*/
mem_regions(&allmem, &availmem);
/*
* Initialize BAT registers to unmapped to not generate
* overlapping mappings below.
*
* The 601's implementation differs in the Valid bit being situated
* in the lower BAT register, and in being a unified BAT only whose
* four entries are accessed through the IBAT[0-3] SPRs.
*
* Also, while the 601 does distinguish between supervisor/user
* protection keys, it does _not_ distinguish between validity in
* supervisor/user mode.
*/
if ((msr & (PSL_IR|PSL_DR)) == 0) {
#ifdef PPC_OEA601
if (cpuvers == MPC601) {
__asm volatile ("mtibatl 0,%0" :: "r"(0));
__asm volatile ("mtibatl 1,%0" :: "r"(0));
__asm volatile ("mtibatl 2,%0" :: "r"(0));
__asm volatile ("mtibatl 3,%0" :: "r"(0));
} else
#endif /* PPC_OEA601 */
{
DBAT_RESET(0); IBAT_RESET(0);
DBAT_RESET(1); IBAT_RESET(1);
DBAT_RESET(2); IBAT_RESET(2);
DBAT_RESET(3); IBAT_RESET(3);
if (oeacpufeat & OEACPU_HIGHBAT) {
DBAT_RESET(4); IBAT_RESET(4);
DBAT_RESET(5); IBAT_RESET(5);
DBAT_RESET(6); IBAT_RESET(6);
DBAT_RESET(7); IBAT_RESET(7);
/*
* Change the first instruction to branch to
* dsitrap_fix_dbat6
*/
dsitrap_fix_dbat4[0] &= ~0xfffc;
dsitrap_fix_dbat4[0]
+= (uintptr_t)dsitrap_fix_dbat6
- (uintptr_t)&dsitrap_fix_dbat4[0];
/*
* Change the second instruction to branch to
* dsitrap_fix_dbat5 if bit 30 (aka bit 1) is
* true.
*/
dsitrap_fix_dbat4[1] = 0x419e0000
+ (uintptr_t)dsitrap_fix_dbat5
- (uintptr_t)&dsitrap_fix_dbat4[1];
/*
* Change it to load dbat4 instead of dbat2
*/
dsitrap_fix_dbat4[2] = 0x7fd88ba6;
dsitrap_fix_dbat4[3] = 0x7ff98ba6;
/*
* Change it to load dbat7 instead of dbat3
*/
dsitrap_fix_dbat7[0] = 0x7fde8ba6;
dsitrap_fix_dbat7[1] = 0x7fff8ba6;
}
}
}
/*
* Set up BAT to map physical memory
*/
#ifdef PPC_OEA601
if (cpuvers == MPC601) {
int i;
/*
* Set up battable to map the lowest 256 MB area.
* Map the lowest 32 MB area via BAT[0-3];
* BAT[01] are fixed, BAT[23] are floating.
*/
for (i = 0; i < 32; i++) {
battable[i].batl = BATL601(i << 23,
BAT601_BSM_8M, BAT601_V);
battable[i].batu = BATU601(i << 23,
BAT601_M, BAT601_Ku, BAT601_PP_NONE);
}
__asm volatile ("mtibatu 0,%1; mtibatl 0,%0"
:: "r"(battable[0x00000000 >> 23].batl),
"r"(battable[0x00000000 >> 23].batu));
__asm volatile ("mtibatu 1,%1; mtibatl 1,%0"
:: "r"(battable[0x00800000 >> 23].batl),
"r"(battable[0x00800000 >> 23].batu));
__asm volatile ("mtibatu 2,%1; mtibatl 2,%0"
:: "r"(battable[0x01000000 >> 23].batl),
"r"(battable[0x01000000 >> 23].batu));
__asm volatile ("mtibatu 3,%1; mtibatl 3,%0"
:: "r"(battable[0x01800000 >> 23].batl),
"r"(battable[0x01800000 >> 23].batu));
}
#endif /* PPC_OEA601 */
/*
* Now setup other fixed bat registers
*
* Note that we still run in real mode, and the BAT
* registers were cleared above.
*/
/*
* Add any I/O BATs specified;
*/
va_start(ap, pa);
while (pa != 0) {
register_t len = va_arg(ap, register_t);
oea_iobat_add(pa, len);
pa = va_arg(ap, paddr_t);
}
va_end(ap);
/*
* Set up battable to map all RAM regions.
*/
#ifdef PPC_OEA601
if (cpuvers == MPC601) {
for (mp = allmem; mp->size; mp++) {
paddr_t paddr = mp->start & 0xff800000;
paddr_t end = mp->start + mp->size;
do {
u_int ix = paddr >> 23;
battable[ix].batl =
BATL601(paddr, BAT601_BSM_8M, BAT601_V);
battable[ix].batu =
BATU601(paddr, BAT601_M, BAT601_Ku, BAT601_PP_NONE);
paddr += (1 << 23);
} while (paddr < end);
}
} else
#endif
{
const register_t bat_inc = BAT_IDX2VA(1);
for (mp = allmem; mp->size; mp++) {
paddr_t paddr = mp->start & -bat_inc;
paddr_t end = roundup2(mp->start + mp->size, bat_inc);
/*
* If the next entries are adjacent, merge them
* into this one
*/
while (mp[1].size && end == (mp[1].start & -bat_inc)) {
mp++;
end = roundup2(mp->start + mp->size, bat_inc);
}
while (paddr < end) {
register_t bl = (oeacpufeat & OEACPU_XBSEN
? BAT_BL_2G
: BAT_BL_256M);
psize_t size = BAT_BL_TO_SIZE(bl);
u_int n = BAT_VA2IDX(size);
u_int i = BAT_VA2IDX(paddr);
while ((paddr & (size - 1))
|| paddr + size > end) {
size >>= 1;
bl = (bl >> 1) & (BAT_XBL|BAT_BL);
n >>= 1;
}
KASSERT(size >= bat_inc);
KASSERT(n >= 1);
KASSERT(bl >= BAT_BL_8M);
register_t batl = BATL(paddr, BAT_M, BAT_PP_RW);
register_t batu = BATU(paddr, bl, BAT_Vs);
for (; n-- > 0; i++) {
battable[i].batl = batl;
battable[i].batu = batu;
}
paddr += size;
}
}
/*
* Set up BAT0 to only map the lowest area.
*/
__asm volatile ("mtibatl 0,%0; mtibatu 0,%1;"
"mtdbatl 0,%0; mtdbatu 0,%1;"
:: "r"(battable[0].batl), "r"(battable[0].batu));
}
}
#endif /* PPC_OEA || PPC_OEA64_BRIDGE */
void
oea_install_extint(void (*handler)(void))
{
extern int extint[], extsize[];
extern int extint_call[];
uintptr_t offset = (uintptr_t)handler - (uintptr_t)extint_call;
#ifdef PPC_HIGH_VEC
const uintptr_t exc_exi_base = EXC_HIGHVEC + EXC_EXI;
#else
const uintptr_t exc_exi_base = EXC_EXI;
#endif
int omsr, msr;
#ifdef DIAGNOSTIC
if (offset > 0x1ffffff)
panic("install_extint: %p too far away (%#lx)", handler,
(unsigned long) offset);
#endif
__asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1"
: "=r" (omsr), "=r" (msr)
: "K" ((u_short)~PSL_EE));
extint_call[0] = (extint_call[0] & 0xfc000003) | offset;
__syncicache((void *)extint_call, sizeof extint_call[0]);
memcpy((void *)exc_exi_base, extint, (size_t)extsize);
#ifdef PPC_OEA64_BRIDGE
if ((oeacpufeat & OEACPU_64_BRIDGE) == 0) {
for (int *ip = (int *)exc_exi_base;
(uintptr_t)ip <= exc_exi_base + (size_t)extsize;
ip++) {
if ((ip[0] & MFMSR_MASK) == MFMSR
&& (ip[1] & RLDICL_MASK) == RLDICL
&& (ip[2] & MTMSRD_MASK) == MTMSRD) {
*ip++ = NOP;
*ip++ = NOP;
ip[0] = NOP;
} else if (*ip == RFID) {
*ip = RFI;
}
}
}
#endif
__syncicache((void *)exc_exi_base, (size_t)extsize);
__asm volatile ("mtmsr %0" :: "r"(omsr));
}
/*
* Machine dependent startup code.
*/
void
oea_startup(const char *model)
{
uintptr_t sz;
void *v;
vaddr_t minaddr, maxaddr;
char pbuf[9], mstr[128];
KASSERT(curcpu() != NULL);
KASSERT(lwp0.l_cpu != NULL);
KASSERT(curcpu()->ci_idepth == -1);
sz = round_page(MSGBUFSIZE);
#ifdef MSGBUFADDR
v = (void *) MSGBUFADDR;
#else
/*
* If the msgbuf is not in segment 0, allocate KVA for it and access
* it via mapped pages. [This prevents unneeded BAT switches.]
*/
v = (void *) msgbuf_paddr;
if (msgbuf_paddr + sz > SEGMENT_LENGTH) {
u_int i;
minaddr = 0;
if (uvm_map(kernel_map, &minaddr, sz,
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE,
UVM_INH_NONE, UVM_ADV_NORMAL, 0)) != 0)
panic("startup: cannot allocate VM for msgbuf");
v = (void *)minaddr;
for (i = 0; i < sz; i += PAGE_SIZE) {
pmap_kenter_pa(minaddr + i, msgbuf_paddr + i,
VM_PROT_READ|VM_PROT_WRITE, 0);
}
pmap_update(pmap_kernel());
}
#endif
initmsgbuf(v, sz);
printf("%s%s", copyright, version);
if (model != NULL)
printf("Model: %s\n", model);
cpu_identify(mstr, sizeof(mstr));
cpu_setmodel("%s", mstr);
format_bytes(pbuf, sizeof(pbuf), ctob((u_int)physmem));
printf("total memory = %s\n", pbuf);
/*
* Allocate away the pages that map to 0xDEA[CDE]xxxx. Do this after
* the bufpages are allocated in case they overlap since it's not
* fatal if we can't allocate these.
*/
if (KERNEL_SR == 13 || KERNEL2_SR == 14) {
int error;
minaddr = 0xDEAC0000;
error = uvm_map(kernel_map, &minaddr, 0x30000,
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
UVM_ADV_NORMAL, UVM_FLAG_FIXED));
if (error != 0 || minaddr != 0xDEAC0000)
printf("oea_startup: failed to allocate DEAD "
"ZONE: error=%d\n", error);
}
minaddr = 0;
/*
* Allocate a submap for physio
*/
phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
VM_PHYS_SIZE, 0, false, NULL);
format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false)));
printf("avail memory = %s\n", pbuf);
#ifdef MULTIPROCESSOR
kcpuset_create(&cpuset_info.cpus_running, true);
kcpuset_create(&cpuset_info.cpus_hatched, true);
kcpuset_create(&cpuset_info.cpus_paused, true);
kcpuset_create(&cpuset_info.cpus_resumed, true);
kcpuset_create(&cpuset_info.cpus_halted, true);
kcpuset_set(cpuset_info.cpus_running, cpu_number());
#endif
}
/*
* Crash dump handling.
*/
void
oea_dumpsys(void)
{
printf("dumpsys: TBD\n");
}
/*
* Convert kernel VA to physical address
*/
paddr_t
kvtop(void *addr)
{
vaddr_t va;
paddr_t pa;
uintptr_t off;
extern char end[];
if (addr < (void *)end)
return (paddr_t)addr;
va = trunc_page((vaddr_t)addr);
off = (uintptr_t)addr - va;
if (pmap_extract(pmap_kernel(), va, &pa) == false) {
/*printf("kvtop: zero page frame (va=0x%x)\n", addr);*/
return (paddr_t)addr;
}
return(pa + off);
}
/*
* Allocate vm space and mapin the I/O address
*/
void *
mapiodev(paddr_t pa, psize_t len, bool prefetchable)
{
paddr_t faddr;
vaddr_t taddr, va;
int off;
faddr = trunc_page(pa);
off = pa - faddr;
len = round_page(off + len);
va = taddr = uvm_km_alloc(kernel_map, len, 0, UVM_KMF_VAONLY);
if (va == 0)
return NULL;
for (; len > 0; len -= PAGE_SIZE) {
pmap_kenter_pa(taddr, faddr, VM_PROT_READ | VM_PROT_WRITE,
PMAP_NOCACHE | (prefetchable ? PMAP_MD_PREFETCHABLE : 0));
faddr += PAGE_SIZE;
taddr += PAGE_SIZE;
}
pmap_update(pmap_kernel());
return (void *)(va + off);
}
void
unmapiodev(vaddr_t va, vsize_t len)
{
paddr_t faddr;
if (! va)
return;
faddr = trunc_page(va);
len = round_page(va - faddr + len);
pmap_kremove(faddr, len);
pmap_update(pmap_kernel());
uvm_km_free(kernel_map, faddr, len, UVM_KMF_VAONLY);
}
void
trap0(void *lr)
{
panic("call to null-ptr from %p", lr);
}
