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/* -------------------------------------------
Copyright (C) 2024, Amlal EL Mahrouss, all rights reserved.
------------------------------------------- */
/**
* @file coreboot-pci-tree.c
* @author Amlal EL Mahrouss (amlal@nekernel.org)
* @brief PCI tree implementation.
* @version 0.1
* @date 2024-01-22
*
* @copyright Copyright (c) 2024 Amlal EL Mahrouss
*
*/
#include <lib/pci-tree.h>
#include <lib/string.h>
/// BUGS: 0
/// Standard Root table (Mahrouss Table)
#define CB_PCI_ROOT_NAME "/pci-tree/@/"
static struct hw_cb_pci_tree* cb_base_tree = nil;
static struct hw_cb_pci_tree* cb_latest_tree = nil;
static struct hw_cb_pci_tree* cb_last_tree = nil;
/// \brief Init the PCI device tree structure.
/// \return if it already exists -> false
/// Otherwise true.
boolean cb_pci_init_tree(void)
{
cb_base_tree = (struct hw_cb_pci_tree*)(CB_PCI_TREE_BASE);
// huh? anyway let's ignore it then.
if (cb_base_tree->d_magic != CB_PCI_DEV_MAGIC)
{
cb_base_tree->d_magic = CB_PCI_DEV_MAGIC;
memncpy(cb_base_tree->d_name, CB_PCI_ROOT_NAME, strlen(CB_PCI_ROOT_NAME));
cb_base_tree->d_next_sibling = 0;
cb_base_tree->d_off_props = 0;
cb_base_tree->d_sz_struct = 0;
cb_base_tree->d_sz_props = 0;
cb_base_tree->d_off_struct = 0;
cb_base_tree->d_version = CB_PCI_VERSION;
cb_base_tree->d_next_sibling =
(cb_pci_num_t)(cb_base_tree + sizeof(struct hw_cb_pci_tree));
cb_base_tree->d_first_node = (cb_pci_num_t)cb_base_tree;
cb_put_string(">> Append root device: " CB_PCI_ROOT_NAME "\r\n");
}
cb_latest_tree = cb_base_tree;
return yes;
}
/// \brief Adds a new device to the tree.
/// \param name the device name.
/// \param struct_ptr the struct containing the device.
/// \param struct_sz the structure size.
boolean cb_pci_append_tree(const caddr_t name, cb_pci_num_t struct_ptr, cb_pci_num_t struct_sz)
{
if (!name || *name == 0 || cb_latest_tree == nil)
return no;
struct hw_cb_pci_tree* cb_pci_tree = (struct hw_cb_pci_tree*)(cb_latest_tree);
while (cb_pci_tree->d_magic == CB_PCI_DEV_MAGIC)
{
if (strcmp(cb_pci_tree->d_name, name) == 0)
return no;
cb_pci_tree =
(struct hw_cb_pci_tree*)(cb_pci_tree +
sizeof(struct hw_cb_pci_tree));
}
cb_pci_tree->d_magic = CB_PCI_DEV_MAGIC;
memncpy(cb_pci_tree->d_name, name, strlen(name));
cb_pci_tree->d_off_struct = struct_ptr;
cb_pci_tree->d_sz_struct = struct_sz;
cb_pci_tree->d_off_props = 0;
cb_pci_tree->d_sz_props = 0;
cb_pci_tree->d_version = CB_PCI_VERSION;
cb_pci_tree->d_next_sibling =
(cb_pci_num_t)(cb_pci_tree + sizeof(struct hw_cb_pci_tree));
cb_pci_tree->d_first_node = (cb_pci_num_t)cb_latest_tree;
cb_latest_tree = cb_pci_tree;
cb_last_tree = cb_pci_tree;
cb_put_string(">> Append device: ");
cb_put_string(name);
cb_put_string("\r\n");
return yes;
}
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