* convert ibm4xx-based evbppc from reserved-TLB entry allocation to recently
introduced ppc4xx_tlb_reserve() API. * ibm405gp UART0 used to be linear mapped. The VA happens to be inside kernel segment, giving us the possibility of multiple VA matches in the TLB. This is considered "programming error" by 405 core and results in "undefined behaviour". We now avoid mapping peripherals in kernel segment. * Some boards used to map hardwired RAM size. We now use the real size as passed in by boot firmware.
This commit is contained in:
kiyohara
parent
471efec80f
commit
d7e6f0e206
@ -1,4 +1,4 @@
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/* $NetBSD: machdep.c,v 1.29 2006/07/13 07:36:04 simonb Exp $ */
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/* $NetBSD: machdep.c,v 1.30 2006/10/16 18:14:37 kiyohara Exp $ */
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/*
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/*
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* Copyright 2001, 2002 Wasabi Systems, Inc.
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* Copyright 2001, 2002 Wasabi Systems, Inc.
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@ -67,7 +67,7 @@
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*/
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*/
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#include <sys/cdefs.h>
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.29 2006/07/13 07:36:04 simonb Exp $");
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__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.30 2006/10/16 18:14:37 kiyohara Exp $");
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#include "opt_compat_netbsd.h"
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#include "opt_compat_netbsd.h"
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#include "opt_ddb.h"
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#include "opt_ddb.h"
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@ -115,6 +115,9 @@ __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.29 2006/07/13 07:36:04 simonb Exp $");
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#include <ddb/db_extern.h>
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#include <ddb/db_extern.h>
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#endif
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#endif
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#define TLB_PG_SIZE (16*1024*1024)
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/*
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/*
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* Global variables used here and there
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* Global variables used here and there
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*/
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*/
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@ -171,6 +174,7 @@ initppc(u_int startkernel, u_int endkernel, char *args, void *info_block)
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#ifdef IPKDB
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#ifdef IPKDB
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extern int ipkdblow, ipkdbsize;
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extern int ipkdblow, ipkdbsize;
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#endif
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#endif
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vaddr_t va;
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int exc, dbcr0;
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int exc, dbcr0;
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struct cpu_info * const ci = curcpu();
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struct cpu_info * const ci = curcpu();
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@ -191,6 +195,13 @@ initppc(u_int startkernel, u_int endkernel, char *args, void *info_block)
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availmemr[0].start = startkernel;
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availmemr[0].start = startkernel;
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availmemr[0].size = board_data.mem_size - availmemr[0].start;
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availmemr[0].size = board_data.mem_size - availmemr[0].start;
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/* Linear map whole physmem */
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for (va = 0; va < board_data.mem_size; va += TLB_PG_SIZE)
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ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX);
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/* Map console just after RAM */
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ppc4xx_tlb_reserve(0xef000000, va, TLB_PG_SIZE, TLB_I | TLB_G);
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/*
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/*
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* Initialize lwp0 and current pcb and pmap pointers.
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* Initialize lwp0 and current pcb and pmap pointers.
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*/
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*/
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@ -1,4 +1,4 @@
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/* $NetBSD: walnut_start.S,v 1.13 2006/06/30 17:54:51 freza Exp $ */
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/* $NetBSD: walnut_start.S,v 1.14 2006/10/16 18:14:37 kiyohara Exp $ */
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/* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
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/* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
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/*
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/*
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@ -192,59 +192,11 @@ __start_cpu0:
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stw %r8,0(%r7)
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stw %r8,0(%r7)
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#endif
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#endif
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/*
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/* Set kernel MMU context. */
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* Set up TLB entry to cover kernel addresses.
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li %r0,KERNEL_PID
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*
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* XXX: Skip TLB 0 for now, due to unresolved TLB 0 replacement
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* and hard hangs
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*/
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li %r0,1
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mtpid %r0
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mtpid %r0
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sync
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sync
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li %r0,0
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#ifdef PPC_4XX_NOCACHE
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li %r4,TLB_EX|TLB_WR|TLB_I /* |TLB_W */
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#else
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li %r4,TLB_EX|TLB_WR /* |TLB_W */
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#endif
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li %r3,TLB_VALID|TLB_PG_16M
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tlbwe %r4,%r0,1 /* Load the data(Low) portion of the entry */
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tlbwe %r3,%r0,0 /* Load the tag(High) portion of the entry */
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#if 1
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/* Damn. Have to be able to access all real memory.... Hardcode for 32M for now. */
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li %r0,1
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lis %r4,0x01000000@h
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ori %r3,%r4,0
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#ifdef PPC_4XX_NOCACHE
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addi %r4,%r4,TLB_EX|TLB_WR|TLB_I /* |TLB_W */
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#else
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addi %r4,%r4,TLB_EX|TLB_WR /* |TLB_W */
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#endif
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addi %r3,%r3,TLB_VALID|TLB_PG_16M
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tlbwe %r4,%r0,1 /* Load the data(Low) portion of the entry */
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tlbwe %r3,%r0,0 /* Load the tag(High) portion of the entry */
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#endif
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/* set up a TLB mapping to cover uart0 */
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lis %r3,0xef000000@h /* Load the virtual address */
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ori %r4,%r3,0 /* Load the physical address */
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clrrwi %r4,%r4,10 /* Mask off the real page number */
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/* write, execute, cache inhibit, guarded */
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ori %r4,%r4,(TLB_WR|TLB_EX|TLB_I|TLB_G)
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clrrwi %r3,%r3,10 /* Mask off the effective page number */
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ori %r3,%r3,(TLB_VALID|TLB_PG_16M)
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li %r0,2
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tlbwe %r4,%r0,1 /* Load the data portion of the entry */
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tlbwe %r3,%r0,0 /* Load the tag portion of the entry */
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/* END of TLB setup */
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INIT_CPUINFO(8,1,9,0)
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INIT_CPUINFO(8,1,9,0)
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mr %r4,%r8
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mr %r4,%r8
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@ -1,4 +1,4 @@
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/* $NetBSD: locore.S,v 1.2 2005/12/11 12:18:43 christos Exp $ */
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/* $NetBSD: locore.S,v 1.3 2006/10/16 18:14:37 kiyohara Exp $ */
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/* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
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/* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
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/*
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/*
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@ -210,59 +210,11 @@ __start_cpu0:
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stw %r8,0(%r7)
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stw %r8,0(%r7)
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#endif
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#endif
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/*
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/* Set kernel MMU context. */
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* Set up TLB entry to cover kernel addresses.
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li %r0,KERNEL_PID
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*
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* XXX: Skip TLB 0 for now, due to unresolved TLB 0 replacement
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* and hard hangs
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*/
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li %r0,1
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mtpid %r0
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mtpid %r0
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sync
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sync
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li %r0,0
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#ifdef PPC_4XX_NOCACHE
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li %r4,TLB_EX|TLB_WR|TLB_I /* |TLB_W */
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#else
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li %r4,TLB_EX|TLB_WR /* |TLB_W */
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#endif
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li %r3,TLB_VALID|TLB_PG_16M
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tlbwe %r4,%r0,1 /* Load the data(Low) portion of the entry */
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tlbwe %r3,%r0,0 /* Load the tag(High) portion of the entry */
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#if 1
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/* Damn. Have to be able to access all real memory.... Hardcode for 32M for now. */
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li %r0,1
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lis %r4,0x01000000@h
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ori %r3,%r4,0
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#ifdef PPC_4XX_NOCACHE
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addi %r4,%r4,TLB_EX|TLB_WR|TLB_I /* |TLB_W */
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#else
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addi %r4,%r4,TLB_EX|TLB_WR /* |TLB_W */
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#endif
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addi %r3,%r3,TLB_VALID|TLB_PG_16M
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tlbwe %r4,%r0,1 /* Load the data(Low) portion of the entry */
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tlbwe %r3,%r0,0 /* Load the tag(High) portion of the entry */
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#endif
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/* set up a TLB mapping to cover uart0 */
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lis %r3,0xef000000@h /* Load the virtual address */
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ori %r4,%r3,0 /* Load the physical address */
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clrrwi %r4,%r4,10 /* Mask off the real page number */
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/* write, execute, cache inhibit, guarded */
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ori %r4,%r4,(TLB_WR|TLB_EX|TLB_I|TLB_G)
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clrrwi %r3,%r3,10 /* Mask off the effective page number */
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ori %r3,%r3,(TLB_VALID|TLB_PG_16M)
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li %r0,2
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tlbwe %r4,%r0,1 /* Load the data portion of the entry */
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tlbwe %r3,%r0,0 /* Load the tag portion of the entry */
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/* END of TLB setup */
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INIT_CPUINFO(8,1,9,0)
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INIT_CPUINFO(8,1,9,0)
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mr %r4,%r8
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mr %r4,%r8
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