dm: sandbox: pci: Add PCI support for sandbox
Add the required header information, device tree nodes and I/O accessor
functions to support PCI on sandbox. All devices are emulated by drivers
which can be added as required for testing or development.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index 1aa397c..007ae86 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -2,7 +2,7 @@
* 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>
@@ -10,6 +10,15 @@
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)
{
if (state_uninit())
@@ -59,9 +68,39 @@
void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
+#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 (void *)(gd->arch.ram_buf + paddr);
}
+void unmap_physmem(const void *vaddr, unsigned long flags)
+{
+#ifdef CONFIG_PCI
+ if (map_dev) {
+ pci_unmap_physmem(vaddr, map_len, map_dev);
+ map_dev = NULL;
+ }
+#endif
+}
+
+void sandbox_set_enable_pci_map(int enable)
+{
+ enable_pci_map = enable;
+}
+
phys_addr_t map_to_sysmem(const void *ptr)
{
return (u8 *)ptr - gd->arch.ram_buf;