1 /* This file is subject to the terms and conditions of the GNU General Public
2 * License. See the file "COPYING" in the main directory of this archive
5 * Copyright (C) 1999-2007 by Helge Deller <deller@gmx.de>
6 * Copyright 1999 SuSE GmbH (Philipp Rumpf)
7 * Copyright 1999 Philipp Rumpf (prumpf@tux.org)
8 * Copyright 2000 Hewlett Packard (Paul Bame, bame@puffin.external.hp.com)
9 * Copyright (C) 2001 Grant Grundler (Hewlett Packard)
10 * Copyright (C) 2004 Kyle McMartin <kyle@debian.org>
12 * Initial Version 04-23-1999 by Helge Deller <deller@gmx.de>
15 #include <asm/asm-offsets.h>
19 #include <asm/assembly.h>
20 #include <asm/pgtable.h>
22 #include <linux/linkage.h>
36 .import init_thread_union,data
37 .import fault_vector_20,code /* IVA parisc 2.0 32 bit */
39 .import fault_vector_11,code /* IVA parisc 1.1 32 bit */
40 .import $global$ /* forward declaration */
41 #endif /*!CONFIG_64BIT*/
42 .export _stext,data /* Kernel want it this way! */
48 /* Make sure sr4-sr7 are set to zero for the kernel address space */
54 /* Clear BSS (shouldn't the boot loader do this?) */
56 .import __bss_start,data
57 .import __bss_stop,data
59 load32 PA(__bss_start),%r3
60 load32 PA(__bss_stop),%r4
62 cmpb,<<,n %r3,%r4,$bss_loop
65 /* Save away the arguments the boot loader passed in (32 bit args) */
66 load32 PA(boot_args),%r1
72 /* Initialize startup VM. Just map first 8/16 MB of memory */
73 load32 PA(swapper_pg_dir),%r4
74 mtctl %r4,%cr24 /* Initialize kernel root pointer */
75 mtctl %r4,%cr25 /* Initialize user root pointer */
80 shrd %r5,PxD_VALUE_SHIFT,%r3
81 ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
82 stw %r3,ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4)
83 ldo ASM_PMD_ENTRY*ASM_PMD_ENTRY_SIZE(%r5),%r4
85 /* 2-level page table, so pmd == pgd */
86 ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4
89 /* Fill in pmd with enough pte directories */
91 SHRREG %r1,PxD_VALUE_SHIFT,%r3
92 ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3
94 ldi ASM_PT_INITIAL,%r1
98 ldo (PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3
101 ldo ASM_PMD_ENTRY_SIZE(%r4),%r4
103 ldo ASM_PGD_ENTRY_SIZE(%r4),%r4
107 /* Now initialize the PTEs themselves */
108 ldo 0+_PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */
109 ldi (1<<(KERNEL_INITIAL_ORDER-PAGE_SHIFT)),%r11 /* PFN count */
113 STREGM %r3,ASM_PTE_ENTRY_SIZE(%r1)
114 ldo (1<<PFN_PTE_SHIFT)(%r3),%r3 /* add one PFN */
115 addib,> -1,%r11,$pgt_fill_loop
118 /* Load the return address...er...crash 'n burn */
121 /* And the RFI Target address too */
122 load32 start_kernel,%r11
124 /* And the initial task pointer */
125 load32 init_thread_union,%r6
128 /* And the stack pointer too */
129 ldo THREAD_SZ_ALGN(%r6),%sp
132 /* Set the smp rendevous address into page zero.
133 ** It would be safer to do this in init_smp_config() but
134 ** it's just way easier to deal with here because
135 ** of 64-bit function ptrs and the address is local to this file.
137 load32 PA(smp_slave_stext),%r10
138 stw %r10,0x10(%r0) /* MEM_RENDEZ */
139 stw %r0,0x28(%r0) /* MEM_RENDEZ_HI - assume addr < 4GB */
145 ** Code Common to both Monarch and Slave processors.
149 ** %r11 must contain RFI target address.
150 ** %r25/%r26 args to pass to target function
151 ** %r2 in case rfi target decides it didn't like something
154 ** %r3 PDCE_PROC address
155 ** %r11 RFI target address
157 ** Caller must init: SR4-7, %sp, %r10, %cr24/25,
163 /* Clear PDC entry point - we won't use it */
164 stw %r0,0x10(%r0) /* MEM_RENDEZ */
165 stw %r0,0x28(%r0) /* MEM_RENDEZ_HI */
166 #endif /*CONFIG_SMP*/
171 /* Save the rfi target address */
172 ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10
174 std %r11, TASK_PT_GR11(%r10)
175 /* Switch to wide mode Superdome doesn't support narrow PDC
178 1: mfia %rp /* clear upper part of pcoq */
184 /* Set Wide mode as the "Default" (eg for traps)
185 ** First trap occurs *right* after (or part of) rfi for slave CPUs.
186 ** Someday, palo might not do this for the Monarch either.
189 #define MEM_PDC_LO 0x388
190 #define MEM_PDC_HI 0x35C
191 ldw MEM_PDC_LO(%r0),%r3
192 ldw MEM_PDC_HI(%r0),%r6
193 depd %r6, 31, 32, %r3 /* move to upper word */
195 ldo PDC_PSW(%r0),%arg0 /* 21 */
196 ldo PDC_PSW_SET_DEFAULTS(%r0),%arg1 /* 2 */
197 ldo PDC_PSW_WIDE_BIT(%r0),%arg2 /* 2 */
198 load32 PA(stext_pdc_ret), %rp
203 /* restore rfi target address*/
204 ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10
206 ldd TASK_PT_GR11(%r10), %r11
210 /* PARANOID: clear user scratch/user space SR's */
216 /* Initialize Protection Registers */
222 /* Initialize the global data pointer */
225 /* Set up our interrupt table. HPMCs might not work after this!
227 * We need to install the correct iva for PA1.1 or PA2.0. The
228 * following short sequence of instructions can determine this
229 * (without being illegal on a PA1.1 machine).
237 comib,<>,n 0,%r10,$is_pa20
238 ldil L%PA(fault_vector_11),%r10
240 ldo R%PA(fault_vector_11)(%r10),%r10
243 .level LEVEL /* restore 1.1 || 2.0w */
244 #endif /*!CONFIG_64BIT*/
245 load32 PA(fault_vector_20),%r10
250 b aligned_rfi /* Prepare to RFI! Man all the cannons! */
257 rsm PSW_SM_QUIET,%r0 /* off troublesome PSW bits */
258 /* Don't need NOPs, have 8 compliant insn before rfi */
260 mtctl %r0,%cr17 /* Clear IIASQ tail */
261 mtctl %r0,%cr17 /* Clear IIASQ head */
263 /* Load RFI target into PC queue */
264 mtctl %r11,%cr18 /* IIAOQ head */
266 mtctl %r11,%cr18 /* IIAOQ tail */
268 load32 KERNEL_PSW,%r10
271 /* Jump through hyperspace to Virt Mode */
279 .import smp_init_current_idle_task,data
280 .import smp_callin,code
286 break 1,1 /* Break if returned from start_secondary */
290 #endif /*!CONFIG_64BIT*/
292 /***************************************************************************
293 * smp_slave_stext is executed by all non-monarch Processors when the Monarch
294 * pokes the slave CPUs in smp.c:smp_boot_cpus().
296 * Once here, registers values are initialized in order to branch to virtual
297 * mode. Once all available/eligible CPUs are in virtual mode, all are
298 * released and start out by executing their own idle task.
299 *****************************************************************************/
305 ** Initialize Space registers
312 /* Initialize the SP - monarch sets up smp_init_current_idle_task */
313 load32 PA(smp_init_current_idle_task),%sp
314 LDREG 0(%sp),%sp /* load task address */
316 LDREG TASK_THREAD_INFO(%sp),%sp
317 mtctl %sp,%cr30 /* store in cr30 */
318 ldo THREAD_SZ_ALGN(%sp),%sp
320 /* point CPU to kernel page tables */
321 load32 PA(swapper_pg_dir),%r4
322 mtctl %r4,%cr24 /* Initialize kernel root pointer */
323 mtctl %r4,%cr25 /* Initialize user root pointer */
326 /* Setup PDCE_PROC entry */
329 /* Load RFI *return* address in case smp_callin bails */
330 load32 smp_callin_rtn,%r2
333 /* Load RFI target address. */
334 load32 smp_callin,%r11
336 /* ok...common code can handle the rest */
341 #endif /* CONFIG_SMP */
349 .export $global$,data
351 .type $global$,@object
355 #endif /*!CONFIG_64BIT*/