sandbox: Tidy up terminal restore

[karo-tx-uboot.git] / arch / sandbox / cpu / cpu.c

diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index 1aa397c5e773d8403293786838df63c7b539fa94..02c4cd366d13c0444eb28f11c35074a06d608413 100644 (file)
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -2,16 +2,28 @@
  * Copyright (c) 2011 The Chromium OS Authors.
  * SPDX-License-Identifier:    GPL-2.0+
  */
-
+#define DEBUG
 #include <common.h>
 #include <dm/root.h>
 #include <os.h>
+#include <asm/io.h>
 #include <asm/state.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/* Enable access to PCI memory with map_sysmem() */
+static bool enable_pci_map;
+
+#ifdef CONFIG_PCI
+/* Last device that was mapped into memory, and length of mapping */
+static struct udevice *map_dev;
+unsigned long map_len;
+#endif
+
 void reset_cpu(ulong ignored)
 {
+       /* Do this here while it still has an effect */
+       os_fd_restore();
        if (state_uninit())
                os_exit(2);
 
@@ -35,31 +47,44 @@ void __udelay(unsigned long usec)
        os_usleep(usec);
 }
 
-unsigned long __attribute__((no_instrument_function)) timer_get_us(void)
+int cleanup_before_linux(void)
 {
-       return os_get_nsec() / 1000;
+       return 0;
 }
 
-int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
 {
-       if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
-               bootstage_mark(BOOTSTAGE_ID_RUN_OS);
-               printf("## Transferring control to Linux (at address %08lx)...\n",
-                      images->ep);
-               reset_cpu(0);
+#ifdef CONFIG_PCI
+       unsigned long plen = len;
+       void *ptr;
+
+       map_dev = NULL;
+       if (enable_pci_map && !pci_map_physmem(paddr, &len, &map_dev, &ptr)) {
+               if (plen != len) {
+                       printf("%s: Warning: partial map at %x, wanted %lx, got %lx\n",
+                              __func__, paddr, len, plen);
+               }
+               map_len = len;
+               return ptr;
        }
+#endif
 
-       return 0;
+       return (void *)(gd->arch.ram_buf + paddr);
 }
 
-int cleanup_before_linux(void)
+void unmap_physmem(const void *vaddr, unsigned long flags)
 {
-       return 0;
+#ifdef CONFIG_PCI
+       if (map_dev) {
+               pci_unmap_physmem(vaddr, map_len, map_dev);
+               map_dev = NULL;
+       }
+#endif
 }
 
-void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
+void sandbox_set_enable_pci_map(int enable)
 {
-       return (void *)(gd->arch.ram_buf + paddr);
+       enable_pci_map = enable;
 }
 
 phys_addr_t map_to_sysmem(const void *ptr)
@@ -70,3 +95,43 @@ phys_addr_t map_to_sysmem(const void *ptr)
 void flush_dcache_range(unsigned long start, unsigned long stop)
 {
 }
+
+int sandbox_read_fdt_from_file(void)
+{
+       struct sandbox_state *state = state_get_current();
+       const char *fname = state->fdt_fname;
+       void *blob;
+       loff_t size;
+       int err;
+       int fd;
+
+       blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
+       if (!state->fdt_fname) {
+               err = fdt_create_empty_tree(blob, 256);
+               if (!err)
+                       goto done;
+               printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
+               return -EINVAL;
+       }
+
+       err = os_get_filesize(fname, &size);
+       if (err < 0) {
+               printf("Failed to file FDT file '%s'\n", fname);
+               return err;
+       }
+       fd = os_open(fname, OS_O_RDONLY);
+       if (fd < 0) {
+               printf("Failed to open FDT file '%s'\n", fname);
+               return -EACCES;
+       }
+       if (os_read(fd, blob, size) != size) {
+               os_close(fd);
+               return -EIO;
+       }
+       os_close(fd);
+
+done:
+       gd->fdt_blob = blob;
+
+       return 0;
+}