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freebsd-dev/stand/libofw/openfirm.c
Leandro Lupori f83288645c powerpc64le: stand fixes 
Fix boot1 and loader on PowerPC64 little-endian (LE).

Due to endian issues, boot1 couldn't find the UFS boot partition
and loader wasn't able to load the kernel. Most of the issues
happened because boot1 and loader were BE binaries trying to access
LE UFS partitions and because loader expects the kernel ELF image
to use the same endian as itself.

To fix these issues, boot1 and loader are now built as LE binaries
on PPC64LE. To support this, the functions that call OpenFirmware
were enhanced to correctly perform endian conversion on its input
and output arguments and to change the CPU into BE mode before
making the calls, as OpenFirmware always runs in BE. Besides that,
some other small fixes were needed.

Submitted by:		bdragon (initial version)
Reviewed by:		alfredo, jhibbits
Sponsored by:		Instituto de Pesquisas Eldorado (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D32160
2021-10-20 15:48:33 -03:00

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/* $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $ */
/*-
* 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.
*/
/*-
* Copyright (C) 2000 Benno Rice.
* 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 Benno Rice ``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>
__FBSDID("$FreeBSD$");
#include <sys/endian.h>
#include <machine/stdarg.h>
#include <stand.h>
#include "openfirm.h"
int (*openfirmware)(void *);
phandle_t chosen;
ihandle_t mmu;
ihandle_t memory;
int real_mode = 0;
#define IN(x) htobe32((cell_t)x)
#define OUT(x) be32toh(x)
#define SETUP(a, b, c, d) \
a.name = IN( (b) ); \
a.nargs = IN( (c) ); \
a.nreturns = IN( (d) );
/* Initialiser */
void
OF_init(int (*openfirm)(void *))
{
phandle_t options;
char mode[sizeof("true")];
openfirmware = openfirm;
if ((chosen = OF_finddevice("/chosen")) == -1)
OF_exit();
if (OF_getprop(chosen, "memory", &memory, sizeof(memory)) == -1) {
memory = OF_open("/memory");
if (memory == -1)
memory = OF_open("/memory@0");
if (memory == -1)
OF_exit();
}
if (OF_getprop(chosen, "mmu", &mmu, sizeof(mmu)) == -1)
OF_exit();
/*
* Check if we run in real mode. If so, we do not need to map
* memory later on.
*/
options = OF_finddevice("/options");
if (OF_getprop(options, "real-mode?", mode, sizeof(mode)) > 0 &&
strcmp(mode, "true") == 0)
real_mode = 1;
}
/*
* Generic functions
*/
/* Test to see if a service exists. */
int
OF_test(char *name)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t service;
cell_t missing;
} args = {};
SETUP(args, "test", 1, 1);
args.service = IN(name);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.missing));
}
/* Return firmware millisecond count. */
int
OF_milliseconds()
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t ms;
} args = {};
SETUP(args, "milliseconds", 0, 1);
openfirmware(&args);
return (OUT(args.ms));
}
/*
* Device tree functions
*/
/* Return the next sibling of this node or 0. */
phandle_t
OF_peer(phandle_t node)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t node;
cell_t next;
} args = {};
SETUP(args, "peer", 1, 1);
args.node = node;
if (openfirmware(&args) == -1)
return (-1);
return (args.next);
}
/* Return the first child of this node or 0. */
phandle_t
OF_child(phandle_t node)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t node;
cell_t child;
} args = {};
SETUP(args, "child", 1, 1);
args.node = node;
if (openfirmware(&args) == -1)
return (-1);
return (args.child);
}
/* Return the parent of this node or 0. */
phandle_t
OF_parent(phandle_t node)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t node;
cell_t parent;
} args = {};
SETUP(args, "parent", 1, 1);
args.node = node;
if (openfirmware(&args) == -1)
return (-1);
return (args.parent);
}
/* Return the package handle that corresponds to an instance handle. */
phandle_t
OF_instance_to_package(ihandle_t instance)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t package;
} args = {};
SETUP(args, "instance-to-package", 1, 1);
args.instance = instance;
if (openfirmware(&args) == -1)
return (-1);
return (args.package);
}
/* Get the length of a property of a package. */
int
OF_getproplen(phandle_t package, const char *propname)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t propname;
cell_t proplen;
} args = {};
SETUP(args, "getproplen", 2, 1);
args.package = package;
args.propname = IN(propname);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.proplen));
}
/* Get the value of a property of a package. */
int
OF_getprop(phandle_t package, const char *propname, void *buf, int buflen)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t propname;
cell_t buf;
cell_t buflen;
cell_t size;
} args = {};
SETUP(args, "getprop", 4, 1);
args.package = package;
args.propname = IN(propname);
args.buf = IN(buf);
args.buflen = IN(buflen);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.size));
}
/* Decode a binary property from a package. */
int
OF_getencprop(phandle_t package, const char *propname, cell_t *buf, int buflen)
{
int retval, i;
retval = OF_getprop(package, propname, buf, buflen);
if (retval == -1)
return (retval);
for (i = 0; i < buflen/4; i++)
buf[i] = be32toh((uint32_t)buf[i]);
return (retval);
}
/* Get the next property of a package. */
int
OF_nextprop(phandle_t package, const char *previous, char *buf)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t previous;
cell_t buf;
cell_t flag;
} args = {};
SETUP(args, "nextprop", 3, 1);
args.package = package;
args.previous = IN(previous);
args.buf = IN(buf);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.flag));
}
/* Set the value of a property of a package. */
/* XXX Has a bug on FirePower */
int
OF_setprop(phandle_t package, const char *propname, void *buf, int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t propname;
cell_t buf;
cell_t len;
cell_t size;
} args = {};
SETUP(args, "setprop", 4, 1);
args.package = package;
args.propname = IN(propname);
args.buf = IN(buf);
args.len = IN(len);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.size));
}
/* Convert a device specifier to a fully qualified pathname. */
int
OF_canon(const char *device, char *buf, int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t device;
cell_t buf;
cell_t len;
cell_t size;
} args = {};
SETUP(args, "canon", 3, 1);
args.device = IN(device);
args.buf = IN(buf);
args.len = IN(len);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.size));
}
/* Return a package handle for the specified device. */
phandle_t
OF_finddevice(const char *device)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t device;
cell_t package;
} args = {};
SETUP(args, "finddevice", 1, 1);
args.device = IN(device);
if (openfirmware(&args) == -1)
return (-1);
return (args.package);
}
/* Return the fully qualified pathname corresponding to an instance. */
int
OF_instance_to_path(ihandle_t instance, char *buf, int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t buf;
cell_t len;
cell_t size;
} args = {};
SETUP(args, "instance-to-path", 3, 1);
args.instance = instance;
args.buf = IN(buf);
args.len = IN(len);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.size));
}
/* Return the fully qualified pathname corresponding to a package. */
int
OF_package_to_path(phandle_t package, char *buf, int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t package;
cell_t buf;
cell_t len;
cell_t size;
} args = {};
SETUP(args, "package-to-path", 3, 1);
args.package = package;
args.buf = IN(buf);
args.len = IN(len);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.size));
}
/* Call the method in the scope of a given instance. */
int
OF_call_method(char *method, ihandle_t instance, int nargs, int nreturns, ...)
{
va_list ap;
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t method;
cell_t instance;
cell_t args_n_results[12];
} args = {};
SETUP(args, "call-method", nargs + 2, nreturns + 1);
cell_t *cp;
int n;
if (nargs > 6)
return (-1);
args.method = IN(method);
args.instance = instance;
va_start(ap, nreturns);
for (cp = (cell_t *)(args.args_n_results + (n = nargs)); --n >= 0;)
*--cp = IN(va_arg(ap, cell_t));
if (openfirmware(&args) == -1)
return (-1);
if (args.args_n_results[nargs])
return (OUT(args.args_n_results[nargs]));
/* XXX what if ihandles or phandles are returned */
for (cp = (cell_t *)(args.args_n_results + nargs +
(n = be32toh(args.nreturns))); --n > 0;)
*va_arg(ap, cell_t *) = OUT(*--cp);
va_end(ap);
return (0);
}
/*
* Device I/O functions
*/
/* Open an instance for a device. */
ihandle_t
OF_open(char *device)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t device;
cell_t instance;
} args = {};
SETUP(args, "open", 1, 1);
args.device = IN(device);
if (openfirmware(&args) == -1 || args.instance == 0) {
return (-1);
}
return (args.instance);
}
/* Close an instance. */
void
OF_close(ihandle_t instance)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
} args = {};
SETUP(args, "close", 1, 0);
args.instance = instance;
openfirmware(&args);
}
/* Read from an instance. */
int
OF_read(ihandle_t instance, void *addr, int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t addr;
cell_t len;
cell_t actual;
} args = {};
SETUP(args, "read", 3, 1);
args.instance = instance;
args.addr = IN(addr);
args.len = IN(len);
#if defined(OPENFIRM_DEBUG)
printf("OF_read: called with instance=%08x, addr=%p, len=%d\n",
instance, addr, len);
#endif
if (openfirmware(&args) == -1)
return (-1);
#if defined(OPENFIRM_DEBUG)
printf("OF_read: returning instance=%d, addr=%p, len=%d, actual=%d\n",
args.instance, OUT(args.addr), OUT(args.len), OUT(args.actual));
#endif
return (OUT(args.actual));
}
/* Write to an instance. */
int
OF_write(ihandle_t instance, void *addr, int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t addr;
cell_t len;
cell_t actual;
} args = {};
SETUP(args, "write", 3, 1);
args.instance = instance;
args.addr = IN(addr);
args.len = IN(len);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.actual));
}
/* Seek to a position. */
int
OF_seek(ihandle_t instance, uint64_t pos)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t poshi;
cell_t poslo;
cell_t status;
} args = {};
SETUP(args, "seek", 3, 1);
args.instance = instance;
args.poshi = IN(((uint64_t)pos >> 32));
args.poslo = IN(pos);
if (openfirmware(&args) == -1)
return (-1);
return (OUT(args.status));
}
/* Blocks. */
unsigned int
OF_blocks(ihandle_t instance)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t result;
cell_t blocks;
} args = {};
SETUP(args, "#blocks", 2, 1);
args.instance = instance;
if (openfirmware(&args) == -1)
return ((unsigned int)-1);
return (OUT(args.blocks));
}
/* Block size. */
int
OF_block_size(ihandle_t instance)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t instance;
cell_t result;
cell_t size;
} args = {};
SETUP(args, "block-size", 2, 1);
args.instance = instance;
if (openfirmware(&args) == -1)
return (512);
return (OUT(args.size));
}
/*
* Memory functions
*/
/* Claim an area of memory. */
void *
OF_claim(void *virt, u_int size, u_int align)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t virt;
cell_t size;
cell_t align;
cell_t baseaddr;
} args = {};
SETUP(args, "claim", 3, 1);
args.virt = IN(virt);
args.size = IN(size);
args.align = IN(align);
if (openfirmware(&args) == -1)
return ((void *)-1);
return ((void *)OUT(args.baseaddr));
}
/* Release an area of memory. */
void
OF_release(void *virt, u_int size)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t virt;
cell_t size;
} args = {};
SETUP(args, "release", 2, 0);
args.virt = IN(virt);
args.size = IN(size);
openfirmware(&args);
}
/*
* Control transfer functions
*/
/* Reset the system and call "boot <bootspec>". */
void
OF_boot(char *bootspec)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t bootspec;
} args = {};
SETUP(args, "boot", 1, 0);
args.bootspec = IN(bootspec);
openfirmware(&args);
for (;;) /* just in case */
;
}
/* Suspend and drop back to the Open Firmware interface. */
void
OF_enter()
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {};
SETUP(args, "enter", 0, 0);
openfirmware(&args);
/* We may come back. */
}
/* Shut down and drop back to the Open Firmware interface. */
void
OF_exit()
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {};
SETUP(args, "exit", 0, 0);
openfirmware(&args);
for (;;) /* just in case */
;
}
void
OF_quiesce()
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
} args = {};
SETUP(args, "quiesce", 0, 0);
openfirmware(&args);
}
/* Free <size> bytes starting at <virt>, then call <entry> with <arg>. */
#if 0
void
OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len)
{
static struct {
cell_t name;
cell_t nargs;
cell_t nreturns;
cell_t virt;
cell_t size;
cell_t entry;
cell_t arg;
cell_t len;
} args = {};
SETUP(args, "chain", 5, 0);
args.virt = IN(virt);
args.size = IN(size);
args.entry = IN(entry);
args.arg = IN(arg);
args.len = IN(len);
openfirmware(&args);
}
#else
void
OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len)
{
/*
* This is a REALLY dirty hack till the firmware gets this going
*/
#if 0
if (size > 0)
OF_release(virt, size);
#endif
entry(0, 0, openfirmware, arg, len);
}
#endif
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