diff options
Diffstat (limited to 'arch/microblaze/kernel/prom.c')
| -rw-r--r-- | arch/microblaze/kernel/prom.c | 157 |
1 files changed, 5 insertions, 152 deletions
diff --git a/arch/microblaze/kernel/prom.c b/arch/microblaze/kernel/prom.c index 0a2c68f9f9b0..76ac4cfdfb42 100644 --- a/arch/microblaze/kernel/prom.c +++ b/arch/microblaze/kernel/prom.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Procedures for creating, accessing and interpreting the device tree. * @@ -6,127 +7,20 @@ * * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. * {engebret|bergner}@us.ibm.com - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ -#include <stdarg.h> -#include <linux/export.h> #include <linux/kernel.h> #include <linux/string.h> -#include <linux/init.h> -#include <linux/threads.h> -#include <linux/spinlock.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/stringify.h> -#include <linux/delay.h> -#include <linux/initrd.h> -#include <linux/bitops.h> -#include <linux/kexec.h> -#include <linux/debugfs.h> -#include <linux/irq.h> #include <linux/memblock.h> - -#include <asm/prom.h> -#include <asm/page.h> -#include <asm/processor.h> -#include <asm/irq.h> -#include <linux/io.h> -#include <asm/mmu.h> -#include <asm/pgtable.h> -#include <asm/sections.h> -#include <asm/pci-bridge.h> - -void __init early_init_dt_add_memory_arch(u64 base, u64 size) -{ - memblock_add(base, size); -} - -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} - -#ifdef CONFIG_EARLY_PRINTK -static char *stdout; - -static int __init early_init_dt_scan_chosen_serial(unsigned long node, - const char *uname, int depth, void *data) -{ - unsigned long l; - char *p; - - pr_debug("%s: depth: %d, uname: %s\n", __func__, depth, uname); - - if (depth == 1 && (strcmp(uname, "chosen") == 0 || - strcmp(uname, "chosen@0") == 0)) { - p = of_get_flat_dt_prop(node, "linux,stdout-path", &l); - if (p != NULL && l > 0) - stdout = p; /* store pointer to stdout-path */ - } - - if (stdout && strstr(stdout, uname)) { - p = of_get_flat_dt_prop(node, "compatible", &l); - pr_debug("Compatible string: %s\n", p); - - if ((strncmp(p, "xlnx,xps-uart16550", 18) == 0) || - (strncmp(p, "xlnx,axi-uart16550", 18) == 0)) { - unsigned int addr; - - *(u32 *)data = UART16550; - - addr = *(u32 *)of_get_flat_dt_prop(node, "reg", &l); - addr += *(u32 *)of_get_flat_dt_prop(node, - "reg-offset", &l); - /* clear register offset */ - return be32_to_cpu(addr) & ~3; - } - if ((strncmp(p, "xlnx,xps-uartlite", 17) == 0) || - (strncmp(p, "xlnx,opb-uartlite", 17) == 0) || - (strncmp(p, "xlnx,axi-uartlite", 17) == 0) || - (strncmp(p, "xlnx,mdm", 8) == 0)) { - unsigned int *addrp; - - *(u32 *)data = UARTLITE; - - addrp = of_get_flat_dt_prop(node, "reg", &l); - return be32_to_cpup(addrp); /* return address */ - } - } - return 0; -} - -/* this function is looking for early console - Microblaze specific */ -int __init of_early_console(void *version) -{ - return of_scan_flat_dt(early_init_dt_scan_chosen_serial, version); -} -#endif +#include <linux/of_fdt.h> void __init early_init_devtree(void *params) { pr_debug(" -> early_init_devtree(%p)\n", params); - /* Setup flat device-tree pointer */ - initial_boot_params = params; - - /* Retrieve various informations from the /chosen node of the - * device-tree, including the platform type, initrd location and - * size, TCE reserve, and more ... - */ - of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line); - - /* Scan memory nodes and rebuild MEMBLOCKs */ - of_scan_flat_dt(early_init_dt_scan_root, NULL); - of_scan_flat_dt(early_init_dt_scan_memory, NULL); - - /* Save command line for /proc/cmdline and then parse parameters */ - strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); - parse_early_param(); + early_init_dt_scan(params, __pa(params)); + if (!strlen(boot_command_line)) + strscpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); memblock_allow_resize(); @@ -134,44 +28,3 @@ void __init early_init_devtree(void *params) pr_debug(" <- early_init_devtree()\n"); } - -#ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) -{ - initrd_start = (unsigned long)__va(start); - initrd_end = (unsigned long)__va(end); - initrd_below_start_ok = 1; -} -#endif - -/******* - * - * New implementation of the OF "find" APIs, return a refcounted - * object, call of_node_put() when done. The device tree and list - * are protected by a rw_lock. - * - * Note that property management will need some locking as well, - * this isn't dealt with yet. - * - *******/ - -#if defined(CONFIG_DEBUG_FS) && defined(DEBUG) -static struct debugfs_blob_wrapper flat_dt_blob; - -static int __init export_flat_device_tree(void) -{ - struct dentry *d; - - flat_dt_blob.data = initial_boot_params; - flat_dt_blob.size = initial_boot_params->totalsize; - - d = debugfs_create_blob("flat-device-tree", S_IFREG | S_IRUSR, - of_debugfs_root, &flat_dt_blob); - if (!d) - return 1; - - return 0; -} -device_initcall(export_flat_device_tree); -#endif |