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-rw-r--r--arch/x86_64/kernel/head.S108
1 files changed, 37 insertions, 71 deletions
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S
index 38fc3d5112e7..692c737feddb 100644
--- a/arch/x86_64/kernel/head.S
+++ b/arch/x86_64/kernel/head.S
@@ -241,104 +241,70 @@ ljumpvector:
241ENTRY(stext) 241ENTRY(stext)
242ENTRY(_stext) 242ENTRY(_stext)
243 243
244.org 0x1000 244 $page = 0
245ENTRY(init_level4_pgt) 245#define NEXT_PAGE(name) \
246 $page = $page + 1; \
247 .org $page * 0x1000; \
248 phys_/**/name = $page * 0x1000 + __PHYSICAL_START; \
249ENTRY(name)
250
251NEXT_PAGE(init_level4_pgt)
246 /* This gets initialized in x86_64_start_kernel */ 252 /* This gets initialized in x86_64_start_kernel */
247 .fill 512,8,0 253 .fill 512,8,0
248 254
249.org 0x2000 255NEXT_PAGE(level3_ident_pgt)
250ENTRY(level3_ident_pgt) 256 .quad phys_level2_ident_pgt | 0x007
251 .quad 0x0000000000004007 + __PHYSICAL_START
252 .fill 511,8,0 257 .fill 511,8,0
253 258
254.org 0x3000 259NEXT_PAGE(level3_kernel_pgt)
255ENTRY(level3_kernel_pgt)
256 .fill 510,8,0 260 .fill 510,8,0
257 /* (2^48-(2*1024*1024*1024)-((2^39)*511))/(2^30) = 510 */ 261 /* (2^48-(2*1024*1024*1024)-((2^39)*511))/(2^30) = 510 */
258 .quad 0x0000000000005007 + __PHYSICAL_START /* -> level2_kernel_pgt */ 262 .quad phys_level2_kernel_pgt | 0x007
259 .fill 1,8,0 263 .fill 1,8,0
260 264
261.org 0x4000 265NEXT_PAGE(level2_ident_pgt)
262ENTRY(level2_ident_pgt)
263 /* 40MB for bootup. */ 266 /* 40MB for bootup. */
264 .quad 0x0000000000000083 267 i = 0
265 .quad 0x0000000000200083 268 .rept 20
266 .quad 0x0000000000400083 269 .quad i << 21 | 0x083
267 .quad 0x0000000000600083 270 i = i + 1
268 .quad 0x0000000000800083 271 .endr
269 .quad 0x0000000000A00083
270 .quad 0x0000000000C00083
271 .quad 0x0000000000E00083
272 .quad 0x0000000001000083
273 .quad 0x0000000001200083
274 .quad 0x0000000001400083
275 .quad 0x0000000001600083
276 .quad 0x0000000001800083
277 .quad 0x0000000001A00083
278 .quad 0x0000000001C00083
279 .quad 0x0000000001E00083
280 .quad 0x0000000002000083
281 .quad 0x0000000002200083
282 .quad 0x0000000002400083
283 .quad 0x0000000002600083
284 /* Temporary mappings for the super early allocator in arch/x86_64/mm/init.c */ 272 /* Temporary mappings for the super early allocator in arch/x86_64/mm/init.c */
285 .globl temp_boot_pmds 273 .globl temp_boot_pmds
286temp_boot_pmds: 274temp_boot_pmds:
287 .fill 492,8,0 275 .fill 492,8,0
288 276
289.org 0x5000 277NEXT_PAGE(level2_kernel_pgt)
290ENTRY(level2_kernel_pgt)
291 /* 40MB kernel mapping. The kernel code cannot be bigger than that. 278 /* 40MB kernel mapping. The kernel code cannot be bigger than that.
292 When you change this change KERNEL_TEXT_SIZE in page.h too. */ 279 When you change this change KERNEL_TEXT_SIZE in page.h too. */
293 /* (2^48-(2*1024*1024*1024)-((2^39)*511)-((2^30)*510)) = 0 */ 280 /* (2^48-(2*1024*1024*1024)-((2^39)*511)-((2^30)*510)) = 0 */
294 .quad 0x0000000000000183 281 i = 0
295 .quad 0x0000000000200183 282 .rept 20
296 .quad 0x0000000000400183 283 .quad i << 21 | 0x183
297 .quad 0x0000000000600183 284 i = i + 1
298 .quad 0x0000000000800183 285 .endr
299 .quad 0x0000000000A00183
300 .quad 0x0000000000C00183
301 .quad 0x0000000000E00183
302 .quad 0x0000000001000183
303 .quad 0x0000000001200183
304 .quad 0x0000000001400183
305 .quad 0x0000000001600183
306 .quad 0x0000000001800183
307 .quad 0x0000000001A00183
308 .quad 0x0000000001C00183
309 .quad 0x0000000001E00183
310 .quad 0x0000000002000183
311 .quad 0x0000000002200183
312 .quad 0x0000000002400183
313 .quad 0x0000000002600183
314 /* Module mapping starts here */ 286 /* Module mapping starts here */
315 .fill 492,8,0 287 .fill 492,8,0
316 288
317.org 0x6000 289NEXT_PAGE(empty_zero_page)
318ENTRY(empty_zero_page)
319
320.org 0x7000
321ENTRY(empty_bad_page)
322 290
323.org 0x8000 291NEXT_PAGE(level3_physmem_pgt)
324ENTRY(empty_bad_pte_table) 292 .quad phys_level2_kernel_pgt | 0x007 /* so that __va works even before pagetable_init */
293 .fill 511,8,0
325 294
326.org 0x9000 295#undef NEXT_PAGE
327ENTRY(empty_bad_pmd_table)
328 296
329.org 0xa000 297 .data
330ENTRY(level3_physmem_pgt)
331 .quad 0x0000000000005007 + __PHYSICAL_START /* -> level2_kernel_pgt (so that __va works even before pagetable_init) */
332 298
333 .org 0xb000
334#ifdef CONFIG_ACPI_SLEEP 299#ifdef CONFIG_ACPI_SLEEP
300 .align PAGE_SIZE
335ENTRY(wakeup_level4_pgt) 301ENTRY(wakeup_level4_pgt)
336 .quad 0x0000000000002007 + __PHYSICAL_START /* -> level3_ident_pgt */ 302 .quad phys_level3_ident_pgt | 0x007
337 .fill 255,8,0 303 .fill 255,8,0
338 .quad 0x000000000000a007 + __PHYSICAL_START 304 .quad phys_level3_physmem_pgt | 0x007
339 .fill 254,8,0 305 .fill 254,8,0
340 /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */ 306 /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
341 .quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */ 307 .quad phys_level3_kernel_pgt | 0x007
342#endif 308#endif
343 309
344#ifndef CONFIG_HOTPLUG_CPU 310#ifndef CONFIG_HOTPLUG_CPU
@@ -352,12 +318,12 @@ ENTRY(wakeup_level4_pgt)
352 */ 318 */
353 .align PAGE_SIZE 319 .align PAGE_SIZE
354ENTRY(boot_level4_pgt) 320ENTRY(boot_level4_pgt)
355 .quad 0x0000000000002007 + __PHYSICAL_START /* -> level3_ident_pgt */ 321 .quad phys_level3_ident_pgt | 0x007
356 .fill 255,8,0 322 .fill 255,8,0
357 .quad 0x000000000000a007 + __PHYSICAL_START 323 .quad phys_level3_physmem_pgt | 0x007
358 .fill 254,8,0 324 .fill 254,8,0
359 /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */ 325 /* (2^48-(2*1024*1024*1024))/(2^39) = 511 */
360 .quad 0x0000000000003007 + __PHYSICAL_START /* -> level3_kernel_pgt */ 326 .quad phys_level3_kernel_pgt | 0x007
361 327
362 .data 328 .data
363 329
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-30 13:21:21 -0500