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Diffstat (limited to 'na/drivers/base/platform.cc')
-rw-r--r--na/drivers/base/platform.cc231
1 files changed, 0 insertions, 231 deletions
diff --git a/na/drivers/base/platform.cc b/na/drivers/base/platform.cc
deleted file mode 100644
index 65ec21e..0000000
--- a/na/drivers/base/platform.cc
+++ /dev/null
@@ -1,231 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/* Copyright (C) 2026 Richard Qin */
-
-/*
- * drivers/base/platform.cc — platform bus + FDT-driven device creation.
- *
- * Mirrors Linux drivers/base/platform.c. Provides:
- * - platform_bus — the bus_type instance
- * - platform_match — compatible-string matching via of_match_table
- * - platform_dispatch — bus->probe forwarder that down-casts and calls
- * platform_driver::probe(platform_device*)
- * - driver_probe_all() — boot entry: register bus, register linker-set
- * drivers, walk FDT, register platform_devices
- *
- * Reference: docs/specs/storage_stack.md §4.3
- */
-
-#include <lume/platform_device.h>
-#include <lume/driver.h>
-#include <lume/device_node.h>
-#include <lume/fdt.h>
-#include <string.h>
-
-/* kmalloc is declared extern "C" in <lume/slab.h>, but mm/slab.cc defines
- * it WITHOUT extern "C" (i.e. C++-mangled). Declare locally with C++
- * linkage so the symbol matches what mm/slab.o exports. */
-void* kmalloc(uint32 size);
-#include <lume/klog.h>
-#include <lume/kprintf.h>
-#include <lume/errno.h>
-#include <lume/container_of.h>
-
-/* ------------------------------------------------------------------ */
-/* Linker-section registry */
-/* ------------------------------------------------------------------ */
-
-extern "C" {
- extern platform_driver* __drivers_start[];
- extern platform_driver* __drivers_end[];
-}
-
-/* ------------------------------------------------------------------ */
-/* platform_bus_type */
-/* ------------------------------------------------------------------ */
-
-static int platform_match(device* dev, device_driver* drv)
-{
- platform_device* pdev = to_platform_device(dev);
- platform_driver* pdrv = to_platform_driver(drv);
-
- if (pdrv->of_match_table == nullptr || pdev->of_node == nullptr) {
- return 0;
- }
- const char* node_compat = pdev->of_node->get_prop_string("compatible");
- if (node_compat == nullptr) {
- return 0;
- }
- for (const of_device_id* id = pdrv->of_match_table;
- id->compatible != nullptr; ++id) {
- if (strcmp(id->compatible, node_compat) == 0) {
- return 1;
- }
- }
- return 0;
-}
-
-static int platform_dispatch(device* dev)
-{
- platform_device* pdev = to_platform_device(dev);
- platform_driver* pdrv = to_platform_driver(dev->driver);
- if (pdrv->probe == nullptr) {
- return 0;
- }
- return pdrv->probe(pdev);
-}
-
-bus_type platform_bus = {
- .name = "platform",
- .match = platform_match,
- .probe = platform_dispatch,
- .devices = {},
- .drivers = {},
- .lock = {},
- .registered = false,
-};
-
-void platform_bus_init()
-{
- bus_register(&platform_bus);
-}
-
-/* ------------------------------------------------------------------ */
-/* platform_driver_register / platform_device_register */
-/* ------------------------------------------------------------------ */
-
-int platform_driver_register(platform_driver* pdrv)
-{
- if (pdrv == nullptr) {
- return -EINVAL;
- }
- pdrv->driver.bus = &platform_bus;
- /* driver.probe is unused — we route through bus->probe. Set name
- * from the first of_match if not already provided. */
- if (pdrv->driver.name == nullptr && pdrv->of_match_table != nullptr) {
- pdrv->driver.name = pdrv->of_match_table[0].compatible;
- }
- return driver_register(&pdrv->driver);
-}
-
-int platform_device_register(platform_device* pdev)
-{
- if (pdev == nullptr) {
- return -EINVAL;
- }
- pdev->dev.bus = &platform_bus;
- if (pdev->dev.init_name == nullptr && pdev->of_node != nullptr) {
- pdev->dev.init_name = pdev->of_node->get_prop_string("compatible");
- }
- device_initialize(&pdev->dev);
- return device_register(&pdev->dev);
-}
-
-/* ------------------------------------------------------------------ */
-/* FDT-driven device instantiation */
-/* ------------------------------------------------------------------ */
-
-static platform_device* alloc_platform_device_from_node(DeviceNode* node,
- const char* compat)
-{
- auto* pdev = static_cast<platform_device*>(
- kmalloc(static_cast<uint32>(sizeof(platform_device))));
- if (pdev == nullptr) {
- return nullptr;
- }
- memset(pdev, 0, sizeof(*pdev));
- pdev->of_node = node;
- pdev->mmio_base = node->get_prop_u64("reg", 0);
- /* "reg" second cell is size — for now we don't bother parsing it
- * separately; drivers that need it pull from of_node directly. */
- pdev->mmio_size = 0;
- pdev->irq = -1;
- pdev->dev.init_name = compat;
- return pdev;
-}
-
-/* For each registered platform_driver, walk its of_match_table and
- * spawn a platform_device for each FDT compatible match found.
- *
- * NOTE: This is a simplified FDT walker — it only finds the FIRST FDT
- * node matching each compatible string (delegating to
- * fdt_find_compatible). Devices with multiple FDT instances of the
- * same compatible will only see one bound here. A full FDT tree walk
- * is left for when virtio-mmio or multi-instance UART arrives.
- */
-static void instantiate_devices_for_driver(platform_driver* pdrv)
-{
- if (pdrv == nullptr || pdrv->of_match_table == nullptr) {
- return;
- }
- for (const of_device_id* id = pdrv->of_match_table;
- id->compatible != nullptr; ++id) {
- DeviceNode* node = fdt_find_compatible(id->compatible);
- if (node == nullptr) {
- continue;
- }
- platform_device* pdev =
- alloc_platform_device_from_node(node, id->compatible);
- if (pdev == nullptr) {
- kprintf("[platform] OOM allocating pdev for %s\n", id->compatible);
- continue;
- }
- kprintf("[platform] instantiating '%s' -> pdev mmio=0x%llx\n",
- id->compatible, pdev->mmio_base);
- platform_device_register(pdev);
- }
-}
-
-/* ------------------------------------------------------------------ */
-/* Boot entry — replaces the old driver_probe_all() */
-/* ------------------------------------------------------------------ */
-
-void driver_probe_all()
-{
- kprintf("[dpa] step 1: &platform_bus=%p (link 0xffffffc08033a0a8)\n",
- &platform_bus);
- kprintf("[dpa] step 1: pre-touch platform_bus.name slot...\n");
- const char** name_slot = &platform_bus.name;
- kprintf("[dpa] step 1: name_slot=%p\n", name_slot);
- kprintf("[dpa] step 1: about to deref *name_slot\n");
- const char* nm = *name_slot;
- kprintf("[dpa] step 1: *name_slot=%p\n", nm);
- kprintf("[dpa] step 1: about to read first byte of nm\n");
- char first = nm != nullptr ? nm[0] : '!';
- kprintf("[dpa] step 1: nm[0]='%c'\n", first);
-
- kprintf("[dpa] step 1: platform_bus_init enter\n");
- platform_bus_init();
- kprintf("[dpa] step 1: platform_bus_init done\n");
-
- platform_driver** start = __drivers_start;
- platform_driver** end = __drivers_end;
- kprintf("[dpa] step 2: __drivers_start=%p __drivers_end=%p count=%lld\n",
- start, end, (long long)(end - start));
-
- for (platform_driver** slot = start; slot < end; ++slot) {
- kprintf("[dpa] step 2: slot=%p *slot=%p\n", slot, *slot);
- if (*slot != nullptr) {
- platform_driver* pdrv = *slot;
- kprintf("[dpa] step 2: pdrv->of_match_table=%p\n",
- pdrv->of_match_table);
- if (pdrv->of_match_table != nullptr) {
- kprintf("[dpa] step 2: pdrv->of_match_table[0].compatible=%p\n",
- pdrv->of_match_table[0].compatible);
- if (pdrv->of_match_table[0].compatible != nullptr) {
- kprintf("[dpa] step 2: compatible='%s'\n",
- pdrv->of_match_table[0].compatible);
- }
- }
- platform_driver_register(pdrv);
- kprintf("[dpa] step 2: registered\n");
- }
- }
-
- kprintf("[dpa] step 3: instantiate devices\n");
- for (platform_driver** slot = start; slot < end; ++slot) {
- if (*slot != nullptr) {
- instantiate_devices_for_driver(*slot);
- }
- }
- kprintf("[dpa] done\n");
-}
generated by cgit v1.2.3 (git 2.46.0) at 2026-10-29 13:02:39 +0000