Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright 2010 Ben. Herrenschmidt, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Based on earlier code:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *   Copyright (C) Paul Mackerras 1997.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *   Matt Porter <mporter@kernel.crashing.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *   Copyright 2002-2005 MontaVista Software Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  *   Copyright (c) 2003, 2004 Zultys Technologies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  *    Copyright 2007 David Gibson, IBM Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "types.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "elf.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "string.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "stdio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "page.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "reg.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "io.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "dcr.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "4xx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "44x.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "libfdt.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) BSS_STACK(4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static u32 ibm4xx_memstart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) static void iss_4xx_fixups(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	void *memory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	u32 reg[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	memory = finddevice("/memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	if (!memory)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		fatal("Can't find memory node\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	/* This assumes #address-cells = 2, #size-cells =1 and that */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	getprop(memory, "reg", reg, sizeof(reg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	if (reg[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		/* If the device tree specifies the memory range, use it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		ibm4xx_memstart = reg[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		/* othersize, read it from the SDRAM controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		ibm4xx_sdram_fixup_memsize();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static void *iss_4xx_vmlinux_alloc(unsigned long size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	return (void *)ibm4xx_memstart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define SPRN_PIR	0x11E	/* Processor Identification Register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) void platform_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	unsigned long end_of_ram = 0x08000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	unsigned long avail_ram = end_of_ram - (unsigned long)_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	u32 pir_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	simple_alloc_init(_end, avail_ram, 128, 64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	platform_ops.fixups = iss_4xx_fixups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	platform_ops.vmlinux_alloc = iss_4xx_vmlinux_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	platform_ops.exit = ibm44x_dbcr_reset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	pir_reg = mfspr(SPRN_PIR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	fdt_set_boot_cpuid_phys(_dtb_start, pir_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	fdt_init(_dtb_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	serial_console_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }