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https://github.com/edk2-porting/linux-next.git
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b0a6fb36a4
Both powerpc and microblaze have the same FDT blob in debugfs feature. Move this to common location and remove the powerpc and microblaze implementations. This feature could become more useful when FDT overlay support is added. This changes the path of the blob from "$arch/flat-device-tree" to "device-tree/flat-device-tree". Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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* Procedures for creating, accessing and interpreting the device tree.
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
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* {engebret|bergner}@us.ibm.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stdarg.h>
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#include <linux/export.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/stringify.h>
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#include <linux/delay.h>
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#include <linux/initrd.h>
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#include <linux/bitops.h>
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#include <linux/kexec.h>
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#include <linux/debugfs.h>
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#include <linux/irq.h>
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#include <linux/memblock.h>
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#include <linux/of_fdt.h>
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#include <asm/prom.h>
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <linux/io.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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#include <asm/sections.h>
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#include <asm/pci-bridge.h>
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#ifdef CONFIG_EARLY_PRINTK
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static const char *stdout;
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static int __init early_init_dt_scan_chosen_serial(unsigned long node,
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const char *uname, int depth, void *data)
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{
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int l;
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const char *p;
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pr_debug("%s: depth: %d, uname: %s\n", __func__, depth, uname);
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if (depth == 1 && (strcmp(uname, "chosen") == 0 ||
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strcmp(uname, "chosen@0") == 0)) {
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p = of_get_flat_dt_prop(node, "linux,stdout-path", &l);
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if (p != NULL && l > 0)
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stdout = p; /* store pointer to stdout-path */
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}
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if (stdout && strstr(stdout, uname)) {
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p = of_get_flat_dt_prop(node, "compatible", &l);
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pr_debug("Compatible string: %s\n", p);
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if ((strncmp(p, "xlnx,xps-uart16550", 18) == 0) ||
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(strncmp(p, "xlnx,axi-uart16550", 18) == 0)) {
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unsigned int addr;
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*(u32 *)data = UART16550;
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addr = *(u32 *)of_get_flat_dt_prop(node, "reg", &l);
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addr += *(u32 *)of_get_flat_dt_prop(node,
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"reg-offset", &l);
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/* clear register offset */
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return be32_to_cpu(addr) & ~3;
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}
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if ((strncmp(p, "xlnx,xps-uartlite", 17) == 0) ||
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(strncmp(p, "xlnx,opb-uartlite", 17) == 0) ||
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(strncmp(p, "xlnx,axi-uartlite", 17) == 0) ||
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(strncmp(p, "xlnx,mdm", 8) == 0)) {
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const unsigned int *addrp;
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*(u32 *)data = UARTLITE;
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addrp = of_get_flat_dt_prop(node, "reg", &l);
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return be32_to_cpup(addrp); /* return address */
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}
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}
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return 0;
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}
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/* this function is looking for early console - Microblaze specific */
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int __init of_early_console(void *version)
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{
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return of_scan_flat_dt(early_init_dt_scan_chosen_serial, version);
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}
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#endif
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void __init early_init_devtree(void *params)
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{
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pr_debug(" -> early_init_devtree(%p)\n", params);
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early_init_dt_scan(params);
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if (!strlen(boot_command_line))
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strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);
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parse_early_param();
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memblock_allow_resize();
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pr_debug("Phys. mem: %lx\n", (unsigned long) memblock_phys_mem_size());
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pr_debug(" <- early_init_devtree()\n");
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}
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