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-rw-r--r--cmd/pci.c83
1 files changed, 83 insertions, 0 deletions
diff --git a/cmd/pci.c b/cmd/pci.c
index 2f4978a..7993c1a 100644
--- a/cmd/pci.c
+++ b/cmd/pci.c
@@ -92,6 +92,77 @@ static void pci_show_regs(pci_dev_t dev, struct pci_reg_info *regs)
}
#endif
+#ifdef CONFIG_DM_PCI
+int pci_bar_show(struct udevice *dev)
+{
+ u8 header_type;
+ int bar_cnt, bar_id, mem_type;
+ bool is_64, is_io;
+ u32 base_low, base_high;
+ u32 size_low, size_high;
+ u64 base, size;
+ u32 reg_addr;
+ int prefetchable;
+
+ dm_pci_read_config8(dev, PCI_HEADER_TYPE, &header_type);
+
+ if (header_type == PCI_HEADER_TYPE_CARDBUS) {
+ printf("CardBus doesn't support BARs\n");
+ return -ENOSYS;
+ }
+
+ bar_cnt = (header_type == PCI_HEADER_TYPE_NORMAL) ? 6 : 2;
+
+ printf("ID Base Size Width Type\n");
+ printf("----------------------------------------------------------\n");
+
+ bar_id = 0;
+ reg_addr = PCI_BASE_ADDRESS_0;
+ while (bar_cnt) {
+ dm_pci_read_config32(dev, reg_addr, &base_low);
+ dm_pci_write_config32(dev, reg_addr, 0xffffffff);
+ dm_pci_read_config32(dev, reg_addr, &size_low);
+ dm_pci_write_config32(dev, reg_addr, base_low);
+ reg_addr += 4;
+
+ base = base_low & ~0xf;
+ size = size_low & ~0xf;
+ base_high = 0x0;
+ size_high = 0xffffffff;
+ is_64 = 0;
+ prefetchable = base_low & PCI_BASE_ADDRESS_MEM_PREFETCH;
+ is_io = base_low & PCI_BASE_ADDRESS_SPACE_IO;
+ mem_type = base_low & PCI_BASE_ADDRESS_MEM_TYPE_MASK;
+
+ if (mem_type == PCI_BASE_ADDRESS_MEM_TYPE_64) {
+ dm_pci_read_config32(dev, reg_addr, &base_high);
+ dm_pci_write_config32(dev, reg_addr, 0xffffffff);
+ dm_pci_read_config32(dev, reg_addr, &size_high);
+ dm_pci_write_config32(dev, reg_addr, base_high);
+ bar_cnt--;
+ reg_addr += 4;
+ is_64 = 1;
+ }
+
+ base = base | ((u64)base_high << 32);
+ size = size | ((u64)size_high << 32);
+
+ if ((!is_64 && size_low) || (is_64 && size)) {
+ size = ~size + 1;
+ printf(" %d %#016llx %#016llx %d %s %s\n",
+ bar_id, base, size, is_64 ? 64 : 32,
+ is_io ? "I/O" : "MEM",
+ prefetchable ? "Prefetchable" : "");
+ }
+
+ bar_id++;
+ bar_cnt--;
+ }
+
+ return 0;
+}
+#endif
+
static struct pci_reg_info regs_start[] = {
{ "vendor ID", PCI_SIZE_16, PCI_VENDOR_ID },
{ "device ID", PCI_SIZE_16, PCI_DEVICE_ID },
@@ -573,6 +644,9 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if (argc > 4)
value = simple_strtoul(argv[4], NULL, 16);
case 'h': /* header */
+#ifdef CONFIG_DM_PCI
+ case 'b': /* bars */
+#endif
if (argc < 3)
goto usage;
if ((bdf = get_pci_dev(argv[2])) == -1)
@@ -641,6 +715,11 @@ static int do_pci(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
ret = pci_cfg_write(dev, addr, size, value);
#endif
break;
+#ifdef CONFIG_DM_PCI
+
+ case 'b': /* bars */
+ return pci_bar_show(dev);
+#endif
default:
ret = CMD_RET_USAGE;
break;
@@ -663,6 +742,10 @@ static char pci_help_text[] =
#endif
"pci header b.d.f\n"
" - show header of PCI device 'bus.device.function'\n"
+#ifdef CONFIG_DM_PCI
+ "pci bar b.d.f\n"
+ " - show BARs base and size for device b.d.f'\n"
+#endif
"pci display[.b, .w, .l] b.d.f [address] [# of objects]\n"
" - display PCI configuration space (CFG)\n"
"pci next[.b, .w, .l] b.d.f address\n"