Add commands pci_{set,get}_path, add pci config files.

linux/pci.c

@@ -4,12 +4,20 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <limits.h>
+#include "pci.h"
+
+char pci_path[PATH_MAX] = ".";
 
 __attribute__((stdcall)) uint32_t pci_read(uint32_t bus, uint32_t dev, uint32_t fun, uint32_t offset, size_t len) {
-    char path[128];
+    char path[PATH_MAX*2];
     uint32_t value = 0;
-    sprintf(path, "/sys/bus/pci/devices/%4.4u:%2.2u:%2.2u.%u/config", 0, bus, dev, fun);
+    sprintf(path, "%s/%4.4u:%2.2u:%2.2u.%u/config", pci_path, 0, bus, dev, fun);
     int fd = open(path, O_RDONLY);
+    if (!fd) {
+        // TODO: report an error
+        return UINT32_MAX;
+    }
     lseek(fd, offset, SEEK_SET);
     read(fd, &value, len);
     close(fd);

linux/pci.h

@@ -0,0 +1,8 @@
+#ifndef PCI_H_INCLUDED
+#define PCI_H_INCLUDED
+
+#include <limits.h>
+
+extern char pci_path[PATH_MAX];
+
+#endif  // PCI_H_INCLUDED

shell.c

@@ -38,6 +38,7 @@
 #include "vnet.h"
 #include "umka.h"
 #include "trace.h"
+#include "pci.h"
 #include "lodepng.h"
 
 #define PATH_MAX 4096
@@ -1117,6 +1118,28 @@ void shell_acpi_get_usage(int argc, char **argv) {
     fprintf(fout, "ACPI usage: %" PRIu32 "\n", kos_acpi_usage);
 }
 
+void shell_pci_set_path(int argc, char **argv) {
+    const char *usage = \
+        "usage: pci_set_path <path>\n"
+        "  path           where aaaa:bb:cc.d dirs are";
+    if (argc != 2) {
+        puts(usage);
+        return;
+    }
+    strcpy(pci_path, argv[1]);
+}
+
+void shell_pci_get_path(int argc, char **argv) {
+    (void)argv;
+    const char *usage = \
+        "usage: pci_get_path";
+    if (argc != 1) {
+        puts(usage);
+        return;
+    }
+    fprintf(fout, "pci path: %s\n", pci_path);
+}
+
 void shell_stack_init(int argc, char **argv) {
     (void)argc;
     (void)argv;
@@ -1908,6 +1931,8 @@ func_table_t funcs[] = {
     { "bg_put_img",              shell_bg_put_img },
     { "bg_map",                  shell_bg_map },
     { "bg_unmap",                shell_bg_unmap },
+    { "pci_set_path",            shell_pci_set_path },
+    { "pci_get_path",            shell_pci_get_path },
     { NULL,                      NULL },
 };
 

test/026_#acpi_m000.ref.log

@@ -1,3 +1,6 @@
+/> pci_set_path machines/000/pci
+/> acpi_set_usage 2
+
 /> acpi_preload_table machines/000/acpi/DSDT
 table #0
 /> acpi_preload_table machines/000/acpi/SSDT1
@@ -12,6 +15,7 @@ table #4
 table #5
 /> acpi_preload_table machines/000/acpi/SSDT6
 table #6
+
 /> acpi_enable
 acpi.aml.process_table begin
 table length 0x00013C50

test/026_#acpi_m000.t

@@ -1,3 +1,6 @@
+pci_set_path machines/000/pci
+acpi_set_usage 2
+
 acpi_preload_table machines/000/acpi/DSDT
 acpi_preload_table machines/000/acpi/SSDT1
 acpi_preload_table machines/000/acpi/SSDT2
@@ -5,4 +8,5 @@ acpi_preload_table machines/000/acpi/SSDT3
 acpi_preload_table machines/000/acpi/SSDT4
 acpi_preload_table machines/000/acpi/SSDT5
 acpi_preload_table machines/000/acpi/SSDT6
+
 acpi_enable

test/027_#acpi_m001.ref.log

@@ -1,9 +1,13 @@
+/> pci_set_path machines/001/pci
+/> acpi_set_usage 2
+
 /> acpi_preload_table machines/001/acpi/DSDT
 table #0
 /> acpi_preload_table machines/001/acpi/SSDT1
 table #1
 /> acpi_preload_table machines/001/acpi/SSDT2
 table #2
+
 /> acpi_enable
 acpi.aml.process_table begin
 table length 0x0000CFFB
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-name: '_ADR'
-tree name: 'PXDY'
-scope name: 'PXDY'
-aml._.name_to_node end
-aml._.get_node_by_name end
-aml._.get_node_by_name begin
-aml._.name_to_node begin
-name: '_ADR'
-tree name: 'PXFX'
-scope name: 'PXFX'
-aml._.name_to_node end
-aml._.get_node_by_name end
-aml._.get_node_by_name begin
-aml._.name_to_node begin
-name: '_ADR'
-tree name: 'PXMX'
-scope name: 'PXMX'
-aml._.name_to_node end
-aml._.get_node_by_name end
-aml._.get_node_by_name begin
-aml._.name_to_node begin
-name: '_ADR'
-tree name: 'PXID'
-scope name: 'PXID'
-aml._.name_to_node end
-aml._.get_node_by_name end
-aml._.get_node_by_name begin
-aml._.name_to_node begin
-name: '_ADR'
-tree name: 'PXEN'
-scope name: 'PXEN'
-aml._.name_to_node end
-aml._.get_node_by_name end
-aml._.get_node_by_name begin
-aml._.name_to_node begin
-name: '_ADR'
-tree name: '_ADR'
-scope name: '_ADR'
-aml._.name_to_node end
-aml._.get_node_by_name end
-aml._.get_node_by_name begin
-aml._.name_to_node begin
 name: '_ADR'
 tree name: '_PRT'
 scope name: '_PRT'
@@ -74707,4 +74094,4 @@ tree name: '_HID'
 scope name: '_HID'
 aml._.name_to_node end
 aml._.get_node_by_name end
- Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device        
+ Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device         Device        DUMP  00:01.0  1002:990D  11

test/027_#acpi_m001.t

@@ -1,4 +1,8 @@
+pci_set_path machines/001/pci
+acpi_set_usage 2
+
 acpi_preload_table machines/001/acpi/DSDT
 acpi_preload_table machines/001/acpi/SSDT1
 acpi_preload_table machines/001/acpi/SSDT2
+
 acpi_enable

test/028_#acpi_m002.d

@@ -1,3 +1,6 @@
+pci_set_path machines/002/pci
+acpi_set_usage 2
+
 acpi_preload_table machines/002/acpi/DSDT
 acpi_preload_table machines/002/acpi/SSDT1
 acpi_preload_table machines/002/acpi/SSDT2
@@ -11,4 +14,5 @@ acpi_preload_table machines/002/acpi/SSDT9
 acpi_preload_table machines/002/acpi/SSDT10
 acpi_preload_table machines/002/acpi/SSDT11
 acpi_preload_table machines/002/acpi/SSDT12
+
 acpi_enable

test/029_#acpi_m003.d

@@ -1,2 +1,6 @@
+pci_set_path machines/003/pci
+acpi_set_usage 2
+
 acpi_preload_table machines/003/acpi/DSDT
+
 acpi_enable

test/030_#acpi_m004.t

@@ -1,5 +1,8 @@
+acpi_set_usage 1
+
 acpi_preload_table machines/004/acpi/DSDT
 acpi_preload_table machines/004/acpi/SSDT1
 acpi_preload_table machines/004/acpi/SSDT2
 acpi_preload_table machines/004/acpi/SSDT3
+
 acpi_enable