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-rw-r--r--pc-bios/README4
-rw-r--r--pc-bios/vof-nvram.binbin0 -> 16384 bytes
-rwxr-xr-xpc-bios/vof.binbin0 -> 3784 bytes
-rw-r--r--pc-bios/vof/Makefile23
-rw-r--r--pc-bios/vof/bootmem.c14
-rw-r--r--pc-bios/vof/ci.c91
-rw-r--r--pc-bios/vof/entry.S49
-rw-r--r--pc-bios/vof/libc.c92
-rw-r--r--pc-bios/vof/main.c21
-rw-r--r--pc-bios/vof/vof.h43
-rw-r--r--pc-bios/vof/vof.lds48
11 files changed, 385 insertions, 0 deletions
diff --git a/pc-bios/README b/pc-bios/README
index c101c9a04f..d344e3bc1b 100644
--- a/pc-bios/README
+++ b/pc-bios/README
@@ -16,6 +16,10 @@
https://github.com/aik/SLOF, and the image currently in qemu is
built from git tag qemu-slof-20210217.
+- VOF (Virtual Open Firmware) is a minimalistic firmware to work with
+ -machine pseries,x-vof=on. When enabled, the firmware acts as a slim shim and
+ QEMU implements parts of the IEEE 1275 Open Firmware interface.
+
- sgabios (the Serial Graphics Adapter option ROM) provides a means for
legacy x86 software to communicate with an attached serial console as
if a video card were attached. The master sources reside in a subversion
diff --git a/pc-bios/vof-nvram.bin b/pc-bios/vof-nvram.bin
new file mode 100644
index 0000000000..d183901cf9
--- /dev/null
+++ b/pc-bios/vof-nvram.bin
Binary files differ
diff --git a/pc-bios/vof.bin b/pc-bios/vof.bin
new file mode 100755
index 0000000000..1ec670be82
--- /dev/null
+++ b/pc-bios/vof.bin
Binary files differ
diff --git a/pc-bios/vof/Makefile b/pc-bios/vof/Makefile
new file mode 100644
index 0000000000..aa1678c4d8
--- /dev/null
+++ b/pc-bios/vof/Makefile
@@ -0,0 +1,23 @@
+all: build-all
+
+build-all: vof.bin
+
+CROSS ?=
+CC = $(CROSS)gcc
+LD = $(CROSS)ld
+OBJCOPY = $(CROSS)objcopy
+
+%.o: %.S
+ $(CC) -m32 -mbig-endian -mcpu=power4 -c -o $@ $<
+
+%.o: %.c
+ $(CC) -m32 -mbig-endian -mcpu=power4 -c -fno-stack-protector -o $@ $<
+
+vof.elf: entry.o main.o ci.o bootmem.o libc.o
+ $(LD) -nostdlib -e_start -Tvof.lds -EB -o $@ $^
+
+%.bin: %.elf
+ $(OBJCOPY) -O binary -j .text -j .data -j .toc -j .got2 $^ $@
+
+clean:
+ rm -f *.o vof.bin vof.elf *~
diff --git a/pc-bios/vof/bootmem.c b/pc-bios/vof/bootmem.c
new file mode 100644
index 0000000000..771b9e95f9
--- /dev/null
+++ b/pc-bios/vof/bootmem.c
@@ -0,0 +1,14 @@
+#include "vof.h"
+
+void boot_from_memory(uint64_t initrd, uint64_t initrdsize)
+{
+ uint64_t kern[2];
+ phandle chosen = ci_finddevice("/chosen");
+
+ if (ci_getprop(chosen, "qemu,boot-kernel", kern, sizeof(kern)) !=
+ sizeof(kern)) {
+ return;
+ }
+
+ do_boot(kern[0], initrd, initrdsize);
+}
diff --git a/pc-bios/vof/ci.c b/pc-bios/vof/ci.c
new file mode 100644
index 0000000000..2b56050238
--- /dev/null
+++ b/pc-bios/vof/ci.c
@@ -0,0 +1,91 @@
+#include "vof.h"
+
+struct prom_args {
+ uint32_t service;
+ uint32_t nargs;
+ uint32_t nret;
+ uint32_t args[10];
+};
+
+typedef unsigned long prom_arg_t;
+
+#define ADDR(x) (uint32_t)(x)
+
+static int prom_handle(struct prom_args *pargs)
+{
+ void *rtasbase;
+ uint32_t rtassize = 0;
+ phandle rtas;
+
+ if (strcmp("call-method", (void *)(unsigned long)pargs->service)) {
+ return -1;
+ }
+
+ if (strcmp("instantiate-rtas", (void *)(unsigned long)pargs->args[0])) {
+ return -1;
+ }
+
+ rtas = ci_finddevice("/rtas");
+ /* rtas-size is set by QEMU depending of FWNMI support */
+ ci_getprop(rtas, "rtas-size", &rtassize, sizeof(rtassize));
+ if (rtassize < hv_rtas_size) {
+ return -1;
+ }
+
+ rtasbase = (void *)(unsigned long) pargs->args[2];
+
+ memcpy(rtasbase, hv_rtas, hv_rtas_size);
+ pargs->args[pargs->nargs] = 0;
+ pargs->args[pargs->nargs + 1] = pargs->args[2];
+
+ return 0;
+}
+
+void prom_entry(uint32_t args)
+{
+ if (prom_handle((void *)(unsigned long) args)) {
+ ci_entry(args);
+ }
+}
+
+static int call_ci(const char *service, int nargs, int nret, ...)
+{
+ int i;
+ struct prom_args args;
+ va_list list;
+
+ args.service = ADDR(service);
+ args.nargs = nargs;
+ args.nret = nret;
+
+ va_start(list, nret);
+ for (i = 0; i < nargs; i++) {
+ args.args[i] = va_arg(list, prom_arg_t);
+ }
+ va_end(list);
+
+ for (i = 0; i < nret; i++) {
+ args.args[nargs + i] = 0;
+ }
+
+ if (ci_entry((uint32_t)(&args)) < 0) {
+ return PROM_ERROR;
+ }
+
+ return (nret > 0) ? args.args[nargs] : 0;
+}
+
+void ci_panic(const char *str)
+{
+ call_ci("exit", 0, 0);
+}
+
+phandle ci_finddevice(const char *path)
+{
+ return call_ci("finddevice", 1, 1, path);
+}
+
+uint32_t ci_getprop(phandle ph, const char *propname, void *prop, int len)
+{
+ return call_ci("getprop", 4, 1, ph, propname, prop, len);
+}
diff --git a/pc-bios/vof/entry.S b/pc-bios/vof/entry.S
new file mode 100644
index 0000000000..10a101fb6d
--- /dev/null
+++ b/pc-bios/vof/entry.S
@@ -0,0 +1,49 @@
+#define LOAD32(rn, name) \
+ lis rn,name##@h; \
+ ori rn,rn,name##@l
+
+#define ENTRY(func_name) \
+ .text; \
+ .align 2; \
+ .globl .func_name; \
+ .func_name: \
+ .globl func_name; \
+ func_name:
+
+#define KVMPPC_HCALL_BASE 0xf000
+#define KVMPPC_H_RTAS (KVMPPC_HCALL_BASE + 0x0)
+#define KVMPPC_H_VOF_CLIENT (KVMPPC_HCALL_BASE + 0x5)
+
+ . = 0x100 /* Do exactly as SLOF does */
+
+ENTRY(_start)
+ LOAD32(2, __toc_start)
+ b entry_c
+
+ENTRY(_prom_entry)
+ LOAD32(2, __toc_start)
+ stwu %r1,-112(%r1)
+ stw %r31,104(%r1)
+ mflr %r31
+ bl prom_entry
+ nop
+ mtlr %r31
+ lwz %r31,104(%r1)
+ addi %r1,%r1,112
+ blr
+
+ENTRY(ci_entry)
+ mr 4,3
+ LOAD32(3,KVMPPC_H_VOF_CLIENT)
+ sc 1
+ blr
+
+/* This is the actual RTAS blob copied to the OS at instantiate-rtas */
+ENTRY(hv_rtas)
+ mr %r4,%r3
+ LOAD32(3,KVMPPC_H_RTAS)
+ sc 1
+ blr
+ .globl hv_rtas_size
+hv_rtas_size:
+ .long . - hv_rtas;
diff --git a/pc-bios/vof/libc.c b/pc-bios/vof/libc.c
new file mode 100644
index 0000000000..00c10e6e7d
--- /dev/null
+++ b/pc-bios/vof/libc.c
@@ -0,0 +1,92 @@
+#include "vof.h"
+
+int strlen(const char *s)
+{
+ int len = 0;
+
+ while (*s != 0) {
+ len += 1;
+ s += 1;
+ }
+
+ return len;
+}
+
+int strcmp(const char *s1, const char *s2)
+{
+ while (*s1 != 0 && *s2 != 0) {
+ if (*s1 != *s2) {
+ break;
+ }
+ s1 += 1;
+ s2 += 1;
+ }
+
+ return *s1 - *s2;
+}
+
+void *memcpy(void *dest, const void *src, size_t n)
+{
+ char *cdest;
+ const char *csrc = src;
+
+ cdest = dest;
+ while (n-- > 0) {
+ *cdest++ = *csrc++;
+ }
+
+ return dest;
+}
+
+int memcmp(const void *ptr1, const void *ptr2, size_t n)
+{
+ const unsigned char *p1 = ptr1;
+ const unsigned char *p2 = ptr2;
+
+ while (n-- > 0) {
+ if (*p1 != *p2) {
+ return *p1 - *p2;
+ }
+ p1 += 1;
+ p2 += 1;
+ }
+
+ return 0;
+}
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+ char *cdest;
+ const char *csrc;
+ int i;
+
+ /* Do the buffers overlap in a bad way? */
+ if (src < dest && src + n >= dest) {
+ /* Copy from end to start */
+ cdest = dest + n - 1;
+ csrc = src + n - 1;
+ for (i = 0; i < n; i++) {
+ *cdest-- = *csrc--;
+ }
+ } else {
+ /* Normal copy is possible */
+ cdest = dest;
+ csrc = src;
+ for (i = 0; i < n; i++) {
+ *cdest++ = *csrc++;
+ }
+ }
+
+ return dest;
+}
+
+void *memset(void *dest, int c, size_t size)
+{
+ unsigned char *d = (unsigned char *)dest;
+
+ while (size-- > 0) {
+ *d++ = (unsigned char)c;
+ }
+
+ return dest;
+}
diff --git a/pc-bios/vof/main.c b/pc-bios/vof/main.c
new file mode 100644
index 0000000000..9fc30d2d09
--- /dev/null
+++ b/pc-bios/vof/main.c
@@ -0,0 +1,21 @@
+#include "vof.h"
+
+void do_boot(unsigned long addr, unsigned long _r3, unsigned long _r4)
+{
+ register unsigned long r3 __asm__("r3") = _r3;
+ register unsigned long r4 __asm__("r4") = _r4;
+ register unsigned long r5 __asm__("r5") = (unsigned long) _prom_entry;
+
+ ((client *)(uint32_t)addr)();
+}
+
+void entry_c(void)
+{
+ register unsigned long r3 __asm__("r3");
+ register unsigned long r4 __asm__("r4");
+ register unsigned long r5 __asm__("r5");
+ uint64_t initrd = r3, initrdsize = r4;
+
+ boot_from_memory(initrd, initrdsize);
+ ci_panic("*** No boot target ***\n");
+}
diff --git a/pc-bios/vof/vof.h b/pc-bios/vof/vof.h
new file mode 100644
index 0000000000..2d89580769
--- /dev/null
+++ b/pc-bios/vof/vof.h
@@ -0,0 +1,43 @@
+/*
+ * Virtual Open Firmware
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <stdarg.h>
+
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+typedef unsigned long uint32_t;
+typedef unsigned long long uint64_t;
+#define NULL (0)
+#define PROM_ERROR (-1u)
+typedef unsigned long ihandle;
+typedef unsigned long phandle;
+typedef int size_t;
+typedef void client(void);
+
+/* globals */
+extern void _prom_entry(void); /* OF CI entry point (i.e. this firmware) */
+
+void do_boot(unsigned long addr, unsigned long r3, unsigned long r4);
+
+/* libc */
+int strlen(const char *s);
+int strcmp(const char *s1, const char *s2);
+void *memcpy(void *dest, const void *src, size_t n);
+int memcmp(const void *ptr1, const void *ptr2, size_t n);
+void *memmove(void *dest, const void *src, size_t n);
+void *memset(void *dest, int c, size_t size);
+
+/* CI wrappers */
+void ci_panic(const char *str);
+phandle ci_finddevice(const char *path);
+uint32_t ci_getprop(phandle ph, const char *propname, void *prop, int len);
+
+/* booting from -kernel */
+void boot_from_memory(uint64_t initrd, uint64_t initrdsize);
+
+/* Entry points for CI and RTAS */
+extern uint32_t ci_entry(uint32_t params);
+extern unsigned long hv_rtas(unsigned long params);
+extern unsigned int hv_rtas_size;
diff --git a/pc-bios/vof/vof.lds b/pc-bios/vof/vof.lds
new file mode 100644
index 0000000000..1506ab4b01
--- /dev/null
+++ b/pc-bios/vof/vof.lds
@@ -0,0 +1,48 @@
+OUTPUT_FORMAT("elf32-powerpc")
+OUTPUT_ARCH(powerpc:common)
+
+/* set the entry point */
+ENTRY ( __start )
+
+SECTIONS {
+ __executable_start = .;
+
+ .text : {
+ *(.text)
+ }
+
+ __etext = .;
+
+ . = ALIGN(8);
+
+ .data : {
+ *(.data)
+ *(.rodata .rodata.*)
+ *(.got1)
+ *(.sdata)
+ *(.opd)
+ }
+
+ /* FIXME bss at end ??? */
+
+ . = ALIGN(8);
+ __bss_start = .;
+ .bss : {
+ *(.sbss) *(.scommon)
+ *(.dynbss)
+ *(.bss)
+ }
+
+ . = ALIGN(8);
+ __bss_end = .;
+ __bss_size = (__bss_end - __bss_start);
+
+ . = ALIGN(256);
+ __toc_start = DEFINED (.TOC.) ? .TOC. : ADDR (.got) + 0x8000;
+ .got :
+ {
+ *(.toc .got)
+ }
+ . = ALIGN(8);
+ __toc_end = .;
+}
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-12 01:09:26 +0000