cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ixp4xx-of.c (1627B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * IXP4xx Device Tree boot support
      4 */
      5#include <linux/kernel.h>
      6#include <linux/init.h>
      7#include <linux/io.h>
      8
      9#include <asm/mach/arch.h>
     10#include <asm/mach/map.h>
     11
     12/*
     13 * These are the only fixed phys to virt mappings we ever need
     14 * we put it right after the UART mapping at 0xffc80000-0xffc81fff
     15 */
     16#define IXP4XX_EXP_CFG_BASE_PHYS	0xC4000000
     17#define IXP4XX_EXP_CFG_BASE_VIRT	0xFEC14000
     18
     19static struct map_desc ixp4xx_of_io_desc[] __initdata = {
     20	/*
     21	 * This is needed for runtime system configuration checks,
     22	 * such as reading if hardware so-and-so is present. This
     23	 * could eventually be converted into a syscon once all boards
     24	 * are converted to device tree.
     25	 */
     26	{
     27		.virtual = IXP4XX_EXP_CFG_BASE_VIRT,
     28		.pfn = __phys_to_pfn(IXP4XX_EXP_CFG_BASE_PHYS),
     29		.length = SZ_4K,
     30		.type = MT_DEVICE,
     31	},
     32#ifdef CONFIG_DEBUG_UART_8250
     33	/* This is needed for LL-debug/earlyprintk/debug-macro.S */
     34	{
     35		.virtual = CONFIG_DEBUG_UART_VIRT,
     36		.pfn = __phys_to_pfn(CONFIG_DEBUG_UART_PHYS),
     37		.length = SZ_4K,
     38		.type = MT_DEVICE,
     39	},
     40#endif
     41};
     42
     43static void __init ixp4xx_of_map_io(void)
     44{
     45	iotable_init(ixp4xx_of_io_desc, ARRAY_SIZE(ixp4xx_of_io_desc));
     46}
     47
     48/*
     49 * We handle 4 differen SoC families. These compatible strings are enough
     50 * to provide the core so that different boards can add their more detailed
     51 * specifics.
     52 */
     53static const char *ixp4xx_of_board_compat[] = {
     54	"intel,ixp42x",
     55	"intel,ixp43x",
     56	"intel,ixp45x",
     57	"intel,ixp46x",
     58	NULL,
     59};
     60
     61DT_MACHINE_START(IXP4XX_DT, "IXP4xx (Device Tree)")
     62	.map_io		= ixp4xx_of_map_io,
     63	.dt_compat	= ixp4xx_of_board_compat,
     64MACHINE_END