~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/microblaze/kernel/setup.c

Version: ~ [ linux-5.12-rc1 ] ~ [ linux-5.11.2 ] ~ [ linux-5.10.19 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.101 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.177 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.222 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.258 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.258 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
  3  * Copyright (C) 2007-2009 PetaLogix
  4  * Copyright (C) 2006 Atmark Techno, Inc.
  5  *
  6  * This file is subject to the terms and conditions of the GNU General Public
  7  * License. See the file "COPYING" in the main directory of this archive
  8  * for more details.
  9  */
 10 
 11 #include <linux/init.h>
 12 #include <linux/clk-provider.h>
 13 #include <linux/clocksource.h>
 14 #include <linux/string.h>
 15 #include <linux/seq_file.h>
 16 #include <linux/cpu.h>
 17 #include <linux/initrd.h>
 18 #include <linux/console.h>
 19 #include <linux/debugfs.h>
 20 #include <linux/of_fdt.h>
 21 
 22 #include <asm/setup.h>
 23 #include <asm/sections.h>
 24 #include <asm/page.h>
 25 #include <linux/io.h>
 26 #include <linux/bug.h>
 27 #include <linux/param.h>
 28 #include <linux/pci.h>
 29 #include <linux/cache.h>
 30 #include <linux/of_platform.h>
 31 #include <linux/dma-mapping.h>
 32 #include <asm/cacheflush.h>
 33 #include <asm/entry.h>
 34 #include <asm/cpuinfo.h>
 35 
 36 #include <asm/prom.h>
 37 #include <asm/pgtable.h>
 38 
 39 DEFINE_PER_CPU(unsigned int, KSP);      /* Saved kernel stack pointer */
 40 DEFINE_PER_CPU(unsigned int, KM);       /* Kernel/user mode */
 41 DEFINE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */
 42 DEFINE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */
 43 DEFINE_PER_CPU(unsigned int, CURRENT_SAVE);     /* Saved current pointer */
 44 
 45 unsigned int boot_cpuid;
 46 /*
 47  * Placed cmd_line to .data section because can be initialized from
 48  * ASM code. Default position is BSS section which is cleared
 49  * in machine_early_init().
 50  */
 51 char cmd_line[COMMAND_LINE_SIZE] __attribute__ ((section(".data")));
 52 
 53 void __init setup_arch(char **cmdline_p)
 54 {
 55         *cmdline_p = boot_command_line;
 56 
 57         console_verbose();
 58 
 59         unflatten_device_tree();
 60 
 61         setup_cpuinfo();
 62 
 63         microblaze_cache_init();
 64 
 65         setup_memory();
 66 
 67 #ifdef CONFIG_EARLY_PRINTK
 68         /* remap early console to virtual address */
 69         remap_early_printk();
 70 #endif
 71 
 72         xilinx_pci_init();
 73 
 74 #if defined(CONFIG_DUMMY_CONSOLE)
 75         conswitchp = &dummy_con;
 76 #endif
 77 }
 78 
 79 #ifdef CONFIG_MTD_UCLINUX
 80 /* Handle both romfs and cramfs types, without generating unnecessary
 81  code (ie no point checking for CRAMFS if it's not even enabled) */
 82 inline unsigned get_romfs_len(unsigned *addr)
 83 {
 84 #ifdef CONFIG_ROMFS_FS
 85         if (memcmp(&addr[0], "-rom1fs-", 8) == 0) /* romfs */
 86                 return be32_to_cpu(addr[2]);
 87 #endif
 88 
 89 #ifdef CONFIG_CRAMFS
 90         if (addr[0] == le32_to_cpu(0x28cd3d45)) /* cramfs */
 91                 return le32_to_cpu(addr[1]);
 92 #endif
 93         return 0;
 94 }
 95 #endif  /* CONFIG_MTD_UCLINUX_EBSS */
 96 
 97 unsigned long kernel_tlb;
 98 
 99 void __init machine_early_init(const char *cmdline, unsigned int ram,
100                 unsigned int fdt, unsigned int msr, unsigned int tlb0,
101                 unsigned int tlb1)
102 {
103         unsigned long *src, *dst;
104         unsigned int offset = 0;
105 
106         /* If CONFIG_MTD_UCLINUX is defined, assume ROMFS is at the
107          * end of kernel. There are two position which we want to check.
108          * The first is __init_end and the second __bss_start.
109          */
110 #ifdef CONFIG_MTD_UCLINUX
111         int romfs_size;
112         unsigned int romfs_base;
113         char *old_klimit = klimit;
114 
115         romfs_base = (ram ? ram : (unsigned int)&__init_end);
116         romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
117         if (!romfs_size) {
118                 romfs_base = (unsigned int)&__bss_start;
119                 romfs_size = PAGE_ALIGN(get_romfs_len((unsigned *)romfs_base));
120         }
121 
122         /* Move ROMFS out of BSS before clearing it */
123         if (romfs_size > 0) {
124                 memmove(&__bss_stop, (int *)romfs_base, romfs_size);
125                 klimit += romfs_size;
126         }
127 #endif
128 
129 /* clearing bss section */
130         memset(__bss_start, 0, __bss_stop-__bss_start);
131         memset(_ssbss, 0, _esbss-_ssbss);
132 
133 /* initialize device tree for usage in early_printk */
134         early_init_devtree(_fdt_start);
135 
136 #ifdef CONFIG_EARLY_PRINTK
137         setup_early_printk(NULL);
138 #endif
139 
140         /* setup kernel_tlb after BSS cleaning
141          * Maybe worth to move to asm code */
142         kernel_tlb = tlb0 + tlb1;
143         /* printk("TLB1 0x%08x, TLB0 0x%08x, tlb 0x%x\n", tlb0,
144                                                         tlb1, kernel_tlb); */
145 
146         pr_info("Ramdisk addr 0x%08x, ", ram);
147         if (fdt)
148                 pr_info("FDT at 0x%08x\n", fdt);
149         else
150                 pr_info("Compiled-in FDT at %p\n", _fdt_start);
151 
152 #ifdef CONFIG_MTD_UCLINUX
153         pr_info("Found romfs @ 0x%08x (0x%08x)\n",
154                         romfs_base, romfs_size);
155         pr_info("#### klimit %p ####\n", old_klimit);
156         BUG_ON(romfs_size < 0); /* What else can we do? */
157 
158         pr_info("Moved 0x%08x bytes from 0x%08x to 0x%08x\n",
159                         romfs_size, romfs_base, (unsigned)&__bss_stop);
160 
161         pr_info("New klimit: 0x%08x\n", (unsigned)klimit);
162 #endif
163 
164 #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
165         if (msr) {
166                 pr_info("!!!Your kernel has setup MSR instruction but ");
167                 pr_cont("CPU don't have it %x\n", msr);
168         }
169 #else
170         if (!msr) {
171                 pr_info("!!!Your kernel not setup MSR instruction but ");
172                 pr_cont("CPU have it %x\n", msr);
173         }
174 #endif
175 
176         /* Do not copy reset vectors. offset = 0x2 means skip the first
177          * two instructions. dst is pointer to MB vectors which are placed
178          * in block ram. If you want to copy reset vector setup offset to 0x0 */
179 #if !CONFIG_MANUAL_RESET_VECTOR
180         offset = 0x2;
181 #endif
182         dst = (unsigned long *) (offset * sizeof(u32));
183         for (src = __ivt_start + offset; src < __ivt_end; src++, dst++)
184                 *dst = *src;
185 
186         /* Initialize global data */
187         per_cpu(KM, 0) = 0x1;   /* We start in kernel mode */
188         per_cpu(CURRENT_SAVE, 0) = (unsigned long)current;
189 }
190 
191 void __init time_init(void)
192 {
193         of_clk_init(NULL);
194         setup_cpuinfo_clk();
195         timer_probe();
196 }
197 
198 #ifdef CONFIG_DEBUG_FS
199 struct dentry *of_debugfs_root;
200 
201 static int microblaze_debugfs_init(void)
202 {
203         of_debugfs_root = debugfs_create_dir("microblaze", NULL);
204 
205         return of_debugfs_root == NULL;
206 }
207 arch_initcall(microblaze_debugfs_init);
208 
209 # ifdef CONFIG_MMU
210 static int __init debugfs_tlb(void)
211 {
212         struct dentry *d;
213 
214         if (!of_debugfs_root)
215                 return -ENODEV;
216 
217         d = debugfs_create_u32("tlb_skip", S_IRUGO, of_debugfs_root, &tlb_skip);
218         if (!d)
219                 return -ENOMEM;
220 
221         return 0;
222 }
223 device_initcall(debugfs_tlb);
224 # endif
225 #endif
226 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp