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https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
Add an implementation of setjmp() and longjmp() which rely on the underlying host C library. Since we cannot know how large the jump buffer needs to be, pick something that should be suitable and check it at runtime. At present we need access to the underlying struct as well. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Alexander Graf <agraf@suse.de>
180 lines
3.2 KiB
C
180 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011 The Chromium OS Authors.
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*/
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#define DEBUG
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <linux/libfdt.h>
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#include <os.h>
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#include <asm/io.h>
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#include <asm/setjmp.h>
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#include <asm/state.h>
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#include <dm/root.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Enable access to PCI memory with map_sysmem() */
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static bool enable_pci_map;
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#ifdef CONFIG_PCI
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/* Last device that was mapped into memory, and length of mapping */
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static struct udevice *map_dev;
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unsigned long map_len;
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#endif
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void sandbox_exit(void)
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{
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/* Do this here while it still has an effect */
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os_fd_restore();
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if (state_uninit())
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os_exit(2);
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if (dm_uninit())
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os_exit(2);
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/* This is considered normal termination for now */
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os_exit(0);
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}
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/* delay x useconds */
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void __udelay(unsigned long usec)
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{
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struct sandbox_state *state = state_get_current();
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if (!state->skip_delays)
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os_usleep(usec);
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}
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int cleanup_before_linux(void)
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{
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return 0;
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}
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int cleanup_before_linux_select(int flags)
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{
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return 0;
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}
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void *phys_to_virt(phys_addr_t paddr)
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{
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return (void *)(gd->arch.ram_buf + paddr);
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}
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phys_addr_t virt_to_phys(void *vaddr)
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{
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return (phys_addr_t)((uint8_t *)vaddr - gd->arch.ram_buf);
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}
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void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
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{
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#if defined(CONFIG_PCI) && !defined(CONFIG_SPL_BUILD)
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unsigned long plen = len;
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void *ptr;
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map_dev = NULL;
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if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) {
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if (plen != len) {
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printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n",
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__func__, (uint)paddr, len, plen);
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}
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map_len = len;
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return ptr;
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}
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#endif
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return phys_to_virt(paddr);
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}
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void unmap_physmem(const void *vaddr, unsigned long flags)
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{
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#ifdef CONFIG_PCI
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if (map_dev) {
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pci_unmap_physmem(vaddr, map_len, map_dev);
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map_dev = NULL;
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}
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#endif
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}
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void sandbox_set_enable_pci_map(int enable)
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{
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enable_pci_map = enable;
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}
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phys_addr_t map_to_sysmem(const void *ptr)
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{
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return (u8 *)ptr - gd->arch.ram_buf;
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}
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void flush_dcache_range(unsigned long start, unsigned long stop)
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{
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}
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void invalidate_dcache_range(unsigned long start, unsigned long stop)
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{
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}
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int sandbox_read_fdt_from_file(void)
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{
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struct sandbox_state *state = state_get_current();
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const char *fname = state->fdt_fname;
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void *blob;
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loff_t size;
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int err;
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int fd;
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blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
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if (!state->fdt_fname) {
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err = fdt_create_empty_tree(blob, 256);
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if (!err)
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goto done;
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printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
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return -EINVAL;
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}
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err = os_get_filesize(fname, &size);
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if (err < 0) {
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printf("Failed to file FDT file '%s'\n", fname);
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return err;
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}
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fd = os_open(fname, OS_O_RDONLY);
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if (fd < 0) {
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printf("Failed to open FDT file '%s'\n", fname);
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return -EACCES;
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}
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if (os_read(fd, blob, size) != size) {
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os_close(fd);
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return -EIO;
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}
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os_close(fd);
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done:
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gd->fdt_blob = blob;
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return 0;
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}
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ulong timer_get_boot_us(void)
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{
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static uint64_t base_count;
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uint64_t count = os_get_nsec();
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if (!base_count)
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base_count = count;
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return (count - base_count) / 1000;
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}
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int setjmp(jmp_buf jmp)
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{
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return os_setjmp((ulong *)jmp, sizeof(*jmp));
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}
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void longjmp(jmp_buf jmp, int ret)
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{
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os_longjmp((ulong *)jmp, ret);
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while (1)
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;
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}
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