aboutsummaryrefslogtreecommitdiff
path: root/sim/ppc/hw_init.c
diff options
context:
space:
mode:
Diffstat (limited to 'sim/ppc/hw_init.c')
-rw-r--r--sim/ppc/hw_init.c569
1 files changed, 0 insertions, 569 deletions
diff --git a/sim/ppc/hw_init.c b/sim/ppc/hw_init.c
deleted file mode 100644
index 6d51c7e..0000000
--- a/sim/ppc/hw_init.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/* This file is part of the program psim.
-
- Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- */
-
-
-#ifndef _HW_INIT_C_
-#define _HW_INIT_C_
-
-#include "device_table.h"
-#include "bfd.h"
-#include "psim.h"
-
-
-/* DMA a file into memory */
-static int
-dma_file(device *me,
- const char *file_name,
- unsigned_word addr)
-{
- int count;
- int inc;
- FILE *image;
- char buf[1024];
-
- /* get it open */
- image = fopen(file_name, "r");
- if (image == NULL)
- return -1;
-
- /* read it in slowly */
- count = 0;
- while (1) {
- inc = fread(buf, 1, sizeof(buf), image);
- if (feof(image) || ferror(image))
- break;
- if (device_dma_write_buffer(device_parent(me),
- buf,
- 0 /*address-space*/,
- addr+count,
- inc /*nr-bytes*/,
- 1 /*violate ro*/) != inc) {
- fclose(image);
- return -1;
- }
- count += inc;
- }
-
- /* close down again */
- fclose(image);
-
- return count;
-}
-
-
-/* DEVICE
-
- file - load a file into memory
-
- DESCRIPTION
-
- Loads the entire contents of <file-name> into memory at starting at
- <real-address>. Assumes that memory exists for the load.
-
- PROPERTIES
-
- file-name = <string>
-
- Name of the file to be loaded into memory
-
- real-address = <integer>
-
- Real address at which the file is to be loaded */
-
-static void
-hw_file_init_data_callback(device *me)
-{
- int count;
- const char *file_name = device_find_string_property(me, "file-name");
- unsigned_word addr = device_find_integer_property(me, "real-address");
- /* load the file */
- count = dma_file(me, file_name, addr);
- if (count < 0)
- device_error(me, "Problem loading file %s\n", file_name);
-}
-
-
-static device_callbacks const hw_file_callbacks = {
- { NULL, hw_file_init_data_callback, },
- { NULL, }, /* address */
- { NULL, }, /* IO */
- { NULL, }, /* DMA */
- { NULL, }, /* interrupt */
- { NULL, }, /* unit */
-};
-
-
-/* DEVICE
-
- data - initialize a memory location
-
- DESCRIPTION
-
- A word sized quantity of data is written into memory, using the
- targets byte ordering, at the specified memory location.
-
- In the future this device will be extended so that it supports
- initialization using other data types (eg array, ...)
-
- PROPERTIES
-
- data = <int>
-
- Integer value to be loaded into memory
-
- real-address = <integer>
-
- Start address for the data. */
-
-
-static void
-hw_data_init_data_callback(device *me)
-{
- unsigned_word addr = device_find_integer_property(me, "real-address");
- const device_property *data = device_find_property(me, "data");
- if (data == NULL)
- device_error(me, "missing property <data>\n");
- switch (data->type) {
- case integer_property:
- {
- unsigned32 buf = device_find_integer_property(me, "data");
- H2T(buf);
- if (device_dma_write_buffer(device_parent(me),
- &buf,
- 0 /*address-space*/,
- addr,
- sizeof(buf), /*nr-bytes*/
- 1 /*violate ro*/) != sizeof(buf))
- device_error(me, "Problem storing integer 0x%x at 0x%lx\n",
- (unsigned)buf, (unsigned long)addr);
- }
- break;
- default:
- device_error(me, "Write of this data is not yet implemented\n");
- break;
- }
-}
-
-
-static device_callbacks const hw_data_callbacks = {
- { NULL, hw_data_init_data_callback, },
- { NULL, }, /* address */
- { NULL, }, /* IO */
- { NULL, }, /* DMA */
- { NULL, }, /* interrupt */
- { NULL, }, /* unit */
-};
-
-
-/* DEVICE
-
- load-binary - load binary segments into memory
-
- DESCRIPTION
-
- Each loadable segment of the specified binary is loaded into memory
- at its required address. It is assumed that the memory at those
- addresses already exists.
-
- This device is normally used to load an executable into memory as
- part of real mode simulation.
-
- PROPERTIES
-
- file-name = <string>
-
- Name of the binary to be loaded.
-
- DEVICE
-
- map-binary - map the binary into the users address space
-
- DESCRIPTION
-
- Similar to load-binary except that memory for each segment is
- created before the corresponding data for the segment is loaded.
-
- This device is normally used to load an executable into a user mode
- simulation.
-
- PROPERTIES
-
- file-name = <string>
-
- Name of the binary to be loaded.
-
- */
-
-static void
-update_for_binary_section(bfd *abfd,
- asection *the_section,
- PTR obj)
-{
- unsigned_word section_vma;
- unsigned_word section_size;
- access_type access;
- device *me = (device*)obj;
-
- /* skip the section if no memory to allocate */
- if (! (bfd_get_section_flags(abfd, the_section) & SEC_ALLOC))
- return;
-
- /* check/ignore any sections of size zero */
- section_size = bfd_get_section_size_before_reloc(the_section);
- if (section_size == 0)
- return;
-
- /* find where it is to go */
- section_vma = bfd_get_section_vma(abfd, the_section);
-
- DTRACE(binary,
- ("name=%-7s, vma=0x%.8lx, size=%6ld, flags=%3lx(%s%s%s%s%s )\n",
- bfd_get_section_name(abfd, the_section),
- (long)section_vma,
- (long)section_size,
- (long)bfd_get_section_flags(abfd, the_section),
- bfd_get_section_flags(abfd, the_section) & SEC_LOAD ? " LOAD" : "",
- bfd_get_section_flags(abfd, the_section) & SEC_CODE ? " CODE" : "",
- bfd_get_section_flags(abfd, the_section) & SEC_DATA ? " DATA" : "",
- bfd_get_section_flags(abfd, the_section) & SEC_ALLOC ? " ALLOC" : "",
- bfd_get_section_flags(abfd, the_section) & SEC_READONLY ? " READONLY" : ""
- ));
-
- /* If there is an .interp section, it means it needs a shared library interpreter. */
- if (strcmp(".interp", bfd_get_section_name(abfd, the_section)) == 0)
- error("Shared libraries are not yet supported.\n");
-
- /* determine the devices access */
- access = access_read;
- if (bfd_get_section_flags(abfd, the_section) & SEC_CODE)
- access |= access_exec;
- if (!(bfd_get_section_flags(abfd, the_section) & SEC_READONLY))
- access |= access_write;
-
- /* if a map, pass up a request to create the memory in core */
- if (strncmp(device_name(me), "map-binary", strlen("map-binary")) == 0)
- device_attach_address(device_parent(me),
- device_name(me),
- attach_raw_memory,
- 0 /*address space*/,
- section_vma,
- section_size,
- access,
- me);
-
- /* if a load dma in the required data */
- if (bfd_get_section_flags(abfd, the_section) & SEC_LOAD) {
- void *section_init = zalloc(section_size);
- if (!bfd_get_section_contents(abfd,
- the_section,
- section_init, 0,
- section_size)) {
- bfd_perror("binary");
- device_error(me, "load of data failed");
- return;
- }
- if (device_dma_write_buffer(device_parent(me),
- section_init,
- 0 /*space*/,
- section_vma,
- section_size,
- 1 /*violate_read_only*/)
- != section_size)
- device_error(me, "broken transfer\n");
- zfree(section_init); /* only free if load */
- }
-}
-
-static void
-hw_binary_init_data_callback(device *me)
-{
- /* get the file name */
- const char *file_name = device_find_string_property(me, "file-name");
- bfd *image;
-
- /* open the file */
- image = bfd_openr(file_name, NULL);
- if (image == NULL) {
- bfd_perror("binary");
- device_error(me, "Failed to open file %s\n", file_name);
- }
-
- /* check it is valid */
- if (!bfd_check_format(image, bfd_object)) {
- bfd_close(image);
- device_error(me, "The file %s has an invalid binary format\n", file_name);
- }
-
- /* and the data sections */
- bfd_map_over_sections(image,
- update_for_binary_section,
- (PTR)me);
-
- bfd_close(image);
-}
-
-
-static device_callbacks const hw_binary_callbacks = {
- { NULL, hw_binary_init_data_callback, },
- { NULL, }, /* address */
- { NULL, }, /* IO */
- { NULL, }, /* DMA */
- { NULL, }, /* interrupt */
- { NULL, }, /* unit */
-};
-
-
-/* DEVICE
-
- stack - create an initial stack frame in memory
-
- DESCRIPTION
-
- Creates a stack frame of the specified type in memory.
-
- Due to the startup sequence gdb uses when commencing a simulation,
- it is not possible for the data to be placed on the stack to be
- specified as part of the device tree. Instead the arguments to be
- pushed onto the stack are specified using an IOCTL call.
-
- The IOCTL takes the additional arguments:
-
- | unsigned_word stack_end -- where the stack should come down from
- | char **argv -- ...
- | char **envp -- ...
-
- PROPERTIES
-
- stack-type = <string>
-
- The form of the stack frame that is to be created.
-
- */
-
-static int
-sizeof_argument_strings(char **arg)
-{
- int sizeof_strings = 0;
-
- /* robust */
- if (arg == NULL)
- return 0;
-
- /* add up all the string sizes (padding as we go) */
- for (; *arg != NULL; arg++) {
- int len = strlen(*arg) + 1;
- sizeof_strings += ALIGN_8(len);
- }
-
- return sizeof_strings;
-}
-
-static int
-number_of_arguments(char **arg)
-{
- int nr;
- if (arg == NULL)
- return 0;
- for (nr = 0; *arg != NULL; arg++, nr++);
- return nr;
-}
-
-static int
-sizeof_arguments(char **arg)
-{
- return ALIGN_8((number_of_arguments(arg) + 1) * sizeof(unsigned_word));
-}
-
-static void
-write_stack_arguments(device *me,
- char **arg,
- unsigned_word start_block,
- unsigned_word end_block,
- unsigned_word start_arg,
- unsigned_word end_arg)
-{
- DTRACE(stack,
- ("write_stack_arguments(device=%s, arg=0x%lx, start_block=0x%lx, end_block=0x%lx, start_arg=0x%lx, end_arg=0x%lx)\n",
- device_name(me), (long)arg, (long)start_block, (long)end_block, (long)start_arg, (long)end_arg));
- if (arg == NULL)
- device_error(me, "Attempt to write a null array onto the stack\n");
- /* only copy in arguments, memory is already zero */
- for (; *arg != NULL; arg++) {
- int len = strlen(*arg)+1;
- unsigned_word target_start_block;
- DTRACE(stack,
- ("write_stack_arguments() write %s=%s at %s=0x%lx %s=0x%lx %s=0x%lx\n",
- "**arg", *arg, "start_block", (long)start_block,
- "len", (long)len, "start_arg", (long)start_arg));
- if (psim_write_memory(device_system(me), 0, *arg,
- start_block, len,
- 0/*violate_readonly*/) != len)
- device_error(me, "Write of **arg (%s) at 0x%lx of stack failed\n",
- *arg, (unsigned long)start_block);
- target_start_block = H2T_word(start_block);
- if (psim_write_memory(device_system(me), 0, &target_start_block,
- start_arg, sizeof(target_start_block),
- 0) != sizeof(target_start_block))
- device_error(me, "Write of *arg onto stack failed\n");
- start_block += ALIGN_8(len);
- start_arg += sizeof(start_block);
- }
- start_arg += sizeof(start_block); /*the null at the end*/
- if (start_block != end_block
- || ALIGN_8(start_arg) != end_arg)
- device_error(me, "Probable corrpution of stack arguments\n");
- DTRACE(stack, ("write_stack_arguments() = void\n"));
-}
-
-static void
-create_ppc_elf_stack_frame(device *me,
- unsigned_word bottom_of_stack,
- char **argv,
- char **envp)
-{
- /* fixme - this is over aligned */
-
- /* information block */
- const unsigned sizeof_envp_block = sizeof_argument_strings(envp);
- const unsigned_word start_envp_block = bottom_of_stack - sizeof_envp_block;
- const unsigned sizeof_argv_block = sizeof_argument_strings(argv);
- const unsigned_word start_argv_block = start_envp_block - sizeof_argv_block;
-
- /* auxiliary vector - contains only one entry */
- const unsigned sizeof_aux_entry = 2*sizeof(unsigned_word); /* magic */
- const unsigned_word start_aux = start_argv_block - ALIGN_8(sizeof_aux_entry);
-
- /* environment points (including null sentinal) */
- const unsigned sizeof_envp = sizeof_arguments(envp);
- const unsigned_word start_envp = start_aux - sizeof_envp;
-
- /* argument pointers (including null sentinal) */
- const int argc = number_of_arguments(argv);
- const unsigned sizeof_argv = sizeof_arguments(argv);
- const unsigned_word start_argv = start_envp - sizeof_argv;
-
- /* link register save address - alligned to a 16byte boundary */
- const unsigned_word top_of_stack = ((start_argv
- - 2 * sizeof(unsigned_word))
- & ~0xf);
-
- /* install arguments on stack */
- write_stack_arguments(me, envp,
- start_envp_block, bottom_of_stack,
- start_envp, start_aux);
- write_stack_arguments(me, argv,
- start_argv_block, start_envp_block,
- start_argv, start_envp);
-
- /* set up the registers */
- psim_write_register(device_system(me), -1,
- &top_of_stack, "sp", cooked_transfer);
- psim_write_register(device_system(me), -1,
- &argc, "r3", cooked_transfer);
- psim_write_register(device_system(me), -1,
- &start_argv, "r4", cooked_transfer);
- psim_write_register(device_system(me), -1,
- &start_envp, "r5", cooked_transfer);
- psim_write_register(device_system(me), -1,
- &start_aux, "r6", cooked_transfer);
-}
-
-static void
-create_ppc_aix_stack_frame(device *me,
- unsigned_word bottom_of_stack,
- char **argv,
- char **envp)
-{
- unsigned_word core_envp;
- unsigned_word core_argv;
- unsigned_word core_argc;
- unsigned_word core_aux;
- unsigned_word top_of_stack;
-
- /* cheat - create an elf stack frame */
- create_ppc_elf_stack_frame(me, bottom_of_stack, argv, envp);
-
- /* extract argument addresses from registers */
- psim_read_register(device_system(me), 0,
- &top_of_stack, "r1", cooked_transfer);
- psim_read_register(device_system(me), 0,
- &core_argc, "r3", cooked_transfer);
- psim_read_register(device_system(me), 0,
- &core_argv, "r4", cooked_transfer);
- psim_read_register(device_system(me), 0,
- &core_envp, "r5", cooked_transfer);
- psim_read_register(device_system(me), 0,
- &core_aux, "r6", cooked_transfer);
-
- /* extract arguments from registers */
- device_error(me, "Unfinished procedure create_ppc_aix_stack_frame\n");
-}
-
-
-
-static int
-hw_stack_ioctl_callback(device *me,
- cpu *processor,
- unsigned_word cia,
- va_list ap)
-{
- unsigned_word stack_pointer;
- const char *stack_type;
- char **argv;
- char **envp;
- stack_pointer = va_arg(ap, unsigned_word);
- argv = va_arg(ap, char **);
- envp = va_arg(ap, char **);
- DTRACE(stack,
- ("stack_ioctl_callback(me=0x%lx:%s processor=0x%lx cia=0x%lx argv=0x%lx envp=0x%lx)\n",
- (long)me, device_name(me), (long)processor, (long)cia, (long)argv, (long)envp));
- stack_type = device_find_string_property(me, "stack-type");
- if (strcmp(stack_type, "ppc-elf") == 0)
- create_ppc_elf_stack_frame(me, stack_pointer, argv, envp);
- else if (strcmp(stack_type, "ppc-xcoff") == 0)
- create_ppc_aix_stack_frame(me, stack_pointer, argv, envp);
- else if (strcmp(stack_type, "none") != 0)
- device_error(me, "Unknown initial stack frame type %s\n", stack_type);
- DTRACE(stack,
- ("stack_ioctl_callback() = void\n"));
- return 0;
-}
-
-static device_callbacks const hw_stack_callbacks = {
- { NULL, },
- { NULL, }, /* address */
- { NULL, }, /* IO */
- { NULL, }, /* DMA */
- { NULL, }, /* interrupt */
- { NULL, }, /* unit */
- NULL, /* instance */
- hw_stack_ioctl_callback,
-};
-
-const device_descriptor hw_init_device_descriptor[] = {
- { "file", NULL, &hw_file_callbacks },
- { "data", NULL, &hw_data_callbacks },
- { "load-binary", NULL, &hw_binary_callbacks },
- { "map-binary", NULL, &hw_binary_callbacks },
- { "stack", NULL, &hw_stack_callbacks },
- { NULL },
-};
-
-#endif _HW_INIT_C_
generated by cgit v1.1 at 2024-12-06 10:22:00 +0000