+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * This file was derived from Xen 3.2's xen/arch/powerpc/boot_of.c,
- * originally licensed under GPL version 2 or later.
- *
- * Copyright IBM Corp. 2005, 2006, 2007
- * Copyright Raptor Engineering, LLC
- *
- * Authors: Jimi Xenidis <jimix@watson.ibm.com>
- * Hollis Blanchard <hollisb@us.ibm.com>
- * Shawn Anastasio <sanastasio@raptorengineering.com>
- */
-
-#include <xen/init.h>
-#include <xen/macros.h>
-#include <xen/stdarg.h>
-#include <xen/types.h>
-#include <asm/boot.h>
-#include <asm/byteorder.h>
-#include <asm/early_printk.h>
-
-/*
- * The Open Firmware client interface is called in 32-bit mode with the MMU off,
- * so any addresses passed to it must be physical addresses under 4GB.
- *
- * Since the client interface is only used during early boot before the MMU is on
- * and Xen itself was loaded by Open Firmware (and therefore resides below 4GB),
- * we can achieve the desired result with a simple cast to uint32_t.
- */
-#define ADDR(x) ((uint32_t)(unsigned long)(x))
-
-/* OF entrypoint*/
-static unsigned long __initdata of_vec;
-
-static int __initdata of_out;
-
-static int __init of_call(const char *service, uint32_t nargs, uint32_t nrets,
- int32_t rets[], ...)
-{
- int rc;
- va_list args;
- unsigned int i;
- struct of_service s;
-
- s.ofs_service = cpu_to_be32(ADDR(service));
- s.ofs_nargs = cpu_to_be32(nargs);
- s.ofs_nrets = cpu_to_be32(nrets);
-
- /* Copy all the params into the args array */
- va_start(args, rets);
-
- for ( i = 0; i < nargs; i++ )
- s.ofs_args[i] = cpu_to_be32(va_arg(args, uint32_t));
-
- va_end(args);
-
- rc = enter_of(&s, of_vec);
-
- /* Copy all return values to the output rets array */
- for ( i = 0; i < nrets; i++ )
- rets[i] = be32_to_cpu(s.ofs_args[i + nargs]);
-
- return rc;
-}
-
-static int __init of_finddevice(const char *devspec)
-{
- int32_t rets[1] = { OF_FAILURE };
-
- of_call("finddevice", 1, ARRAY_SIZE(rets), rets, ADDR(devspec));
- return rets[0];
-}
-
-static int __init of_getprop(int ph, const char *name, void *buf, uint32_t buflen)
-{
- int32_t rets[1] = { OF_FAILURE };
-
- of_call("getprop", 4, ARRAY_SIZE(rets), rets, ph, ADDR(name), ADDR(buf),
- buflen);
- return rets[0];
-}
-
-int __init of_write(int ih, const char *addr, uint32_t len)
-{
- int32_t rets[1] = { OF_FAILURE };
-
- of_call("write", 3, ARRAY_SIZE(rets), rets, ih, ADDR(addr), len);
- return rets[0];
-}
-
-static void __init of_putchar(char c)
-{
- if ( c == '\n' )
- {
- char buf = '\r';
- of_write(of_out, &buf, 1);
- }
- of_write(of_out, &c, 1);
-}
-
-void __init boot_of_init(unsigned long vec)
-{
- int bof_chosen;
-
- of_vec = vec;
-
- /* Get a handle to the default console */
- bof_chosen = of_finddevice("/chosen");
- of_getprop(bof_chosen, "stdout", &of_out, sizeof(of_out));
- of_out = be32_to_cpu(of_out);
-
- early_printk_init(of_putchar);
-}
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Adapted from Linux's arch/powerpc/kernel/entry_64.S, with the
- * following copyright notice:
- *
- * PowerPC version
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- * Rewritten by Cort Dougan (cort@cs.nmt.edu) for PReP
- * Copyright (C) 1996 Cort Dougan <cort@cs.nmt.edu>
- * Adapted for Power Macintosh by Paul Mackerras.
- * Low-level exception handlers and MMU support
- * rewritten by Paul Mackerras.
- * Copyright (C) 1996 Paul Mackerras.
- * MPC8xx modifications Copyright (C) 1997 Dan Malek (dmalek@jlc.net).
- */
-
-#include <asm/asm-offsets.h>
-#include <asm/asm-defns.h>
-#include <asm/msr.h>
-
-/* size of minimum stack frame that can hold an entire cpu_user_regs struct */
-#define STACK_SWITCH_FRAME_SIZE UREGS_sizeof
-
- .section .init.text, "ax", @progbits
-
-ENTRY(enter_of)
- mflr %r0
- std %r0, 16(%r1)
- stdu %r1, -STACK_SWITCH_FRAME_SIZE(%r1) /* Save SP and create stack space */
-
- /*
- * Because PROM is running in 32b mode, it clobbers the high order half
- * of all registers that it saves. We therefore save those registers
- * PROM might touch to the stack. (%r0, %r3-%r13 are caller saved)
- */
- SAVE_GPR(2, %r1)
- SAVE_GPR(13, %r1)
- SAVE_NVGPRS(%r1)
- mfcr %r10
- mfmsr %r11
- std %r10, UREGS_cr(%r1)
- std %r11, UREGS_msr(%r1)
-
- /* Put PROM address in SRR0 */
- mtsrr0 %r4
-
- /* Setup our trampoline return addr in LR */
- bcl 20, 31, .+4
-0: mflr %r4
- addi %r4, %r4, 1f - 0b
- mtlr %r4
-
- /* Prepare a 32-bit mode big endian MSR */
- LOAD_IMM64(%r12, MSR_SF | MSR_LE)
- andc %r11, %r11, %r12
- mtsrr1 %r11
- rfid
-
-1: /* Return from OF */
- FIXUP_ENDIAN
-
- /* Just make sure that %r1 top 32 bits didn't get corrupt by OF */
- rldicl %r1, %r1, 0, 32
-
- /* Restore the MSR (back to 64 bits) */
- ld %r0, UREGS_msr(%r1)
- mtmsrd %r0
- isync
-
- /* Restore other registers */
- REST_GPR(2, %r1)
- REST_GPR(13, %r1)
- REST_NVGPRS(%r1)
- ld %r4, UREGS_cr(%r1)
- mtcr %r4
-
- addi %r1, %r1, STACK_SWITCH_FRAME_SIZE
- ld %r0, 16(%r1)
- mtlr %r0
- blr
-
- .size enter_of, . - enter_of
- .type enter_of, %function
projects / people / royger / xen.git / commitdiff