pc/archacpi: don't do acpi initialization in the kernel, provide generic acpimem routines
get rid of _INI and _REG method calls, this is not full acpi environment anyway and all we really want todo at kernel boot time is figuring out the interrupt routing. aux/acpi can try to enable more stuff if it needs to later when battery status desired. dont snoop memory space regions in amlmapio(), this is just wrong as amlmapio() is *lazily* mapping regions as they are accessed, so the range table would never be really complete. instead, we provide generic access to the physical address space, excluding kernel and user memory with acpimem file.
This commit is contained in:
cinap_lenrek
parent
055f837043
commit
98dba9a4a3
1 changed files with 68 additions and 81 deletions
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@ -4,20 +4,15 @@
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "../port/error.h"
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#include "mp.h"
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#include <aml.h>
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typedef struct Memreg Memreg;
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typedef struct Rsd Rsd;
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typedef struct Tbl Tbl;
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struct Memreg {
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uintptr addr;
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int size;
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};
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struct Rsd {
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uchar sig[8];
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uchar csum;
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@ -57,9 +52,6 @@ static uintptr tblpa[64];
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static int ntblmap;
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static Tbl *tblmap[64];
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static int nmemregs;
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static Memreg memregs[16];
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static ushort
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get16(uchar *p){
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return p[1]<<8 | p[0];
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@ -83,6 +75,34 @@ tbldlen(Tbl *t){
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return get32(t->len) - Tblsz;
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}
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static long
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memcheck(uintptr pa, long len)
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{
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int i;
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uintptr pe;
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Confmem *cm;
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if(len <= 0)
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return len;
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pe = pa + len-1;
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if(pe < pa){
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len = -pa;
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pe = pa + len-1;
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}
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if(pa < PADDR(CPU0END))
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return 0;
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if(pe >= PADDR(KTZERO) && pa < PADDR(end))
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return PADDR(KTZERO) - pa;
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for(i=0; i<nelem(conf.mem); i++){
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cm = &conf.mem[i];
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if(cm->npage == 0)
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continue;
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if(pe >= cm->base && pa <= cm->base + cm->npage*BY2PG - 1)
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return cm->base - pa;
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}
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return len;
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}
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static void
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maptable(uvlong xpa)
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{
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@ -111,7 +131,14 @@ maptable(uvlong xpa)
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vunmap(t, 8);
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return;
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}
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if(memcheck(pa, l) != l){
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print("maptable: ignoring %.4s at [%#p-%#p); overlaps usable memory\n",
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(char*)t->sig, pa, pa+l);
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vunmap(t, 8);
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return;
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}
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vunmap(t, 8);
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if((t = vmap(pa, l)) == nil)
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return;
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if(checksum(t, l)){
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@ -466,29 +493,6 @@ enumprt(void *dot, void *)
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return 1;
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}
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static int
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enumini(void *dot, void *)
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{
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void *p, *r;
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int s;
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/*
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* If there is no _STA (or it fails), device should be
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* considered present and enabled.
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*/
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s = 0xff;
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if((p = amlwalk(dot, "^_STA")) != nil){
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if(amleval(p, "", &r) >= 0)
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s = amlint(r);
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if((s & 1) == 0) /* return if not present */
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return 1;
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}
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if(s & 1) /* initialize everything present */
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amleval(dot, "", nil);
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/* recurse if present, enabled and "ok" */
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return (s & 11) == 11 ? 0 : 1;
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}
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static int
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enumec(void *dot, void *)
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{
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@ -509,8 +513,6 @@ enumec(void *dot, void *)
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return 1;
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dataport = b[0+2] | b[0+3]<<8;
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cmdport = b[8+2] | b[8+3]<<8;
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if((x = amlwalk(dot, "^_REG")) != nil)
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amleval(x, "ii", 3, 1, nil);
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ecinit(cmdport, dataport);
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return 1;
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}
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@ -518,51 +520,41 @@ enumec(void *dot, void *)
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static long
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readmem(Chan*, void *v, long n, vlong o)
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{
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int i;
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uchar *t;
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uintptr start, end;
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Memreg *mr;
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uintptr pa = (uintptr)o;
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void *t;
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start = o;
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end = start + n;
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for(i = 0; n > 0 && i < nmemregs; i++){
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mr = &memregs[i];
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if(start >= mr->addr && start < mr->addr+mr->size){
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if(end > mr->addr+mr->size)
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end = mr->addr+mr->size;
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n = end - start;
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t = vmap(mr->addr, n);
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memmove(v, start - mr->addr + t, n);
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vunmap(t, n);
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return n;
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}
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if((n = memcheck(pa, n)) <= 0)
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return 0;
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if((t = vmap(pa, n)) == nil)
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error(Enovmem);
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if(waserror()){
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vunmap(t, n);
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nexterror();
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}
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return 0;
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memmove(v, t, n);
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vunmap(t, n);
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poperror();
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return n;
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}
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static long
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writemem(Chan*, void *v, long n, vlong o)
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{
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int i;
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uchar *t;
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uintptr start, end;
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Memreg *mr;
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uintptr pa = (uintptr)o;
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void *t;
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start = o;
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end = start + n;
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for(i = 0; n > 0 && i < nmemregs; i++){
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mr = &memregs[i];
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if(start >= mr->addr && start < mr->addr+mr->size){
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if(end > mr->addr+mr->size)
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end = mr->addr+mr->size;
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n = end - start;
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t = vmap(mr->addr, n);
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memmove(start - mr->addr + t, v, n);
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vunmap(t, n);
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return n;
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}
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if(memcheck(pa, n) != n)
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error(Eio);
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if((t = vmap(pa, n)) == nil)
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error(Enovmem);
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if(waserror()){
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vunmap(t, n);
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nexterror();
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}
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return 0;
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memmove(t, v, n);
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vunmap(t, n);
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poperror();
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return n;
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}
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static void
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@ -579,9 +571,6 @@ acpiinit(void)
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amlinit();
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if(getconf("*acpimem") != nil)
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addarchfile("acpimem", 0660, readmem, writemem);
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/* load DSDT */
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for(i=0; i<ntblmap; i++){
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t = tblmap[i];
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@ -701,9 +690,6 @@ Foundapic:
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/* find embedded controller */
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amlenum(amlroot, "_HID", enumec, nil);
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/* init */
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amlenum(amlroot, "_INI", enumini, nil);
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/* look for PCI interrupt mappings */
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amlenum(amlroot, "_PRT", enumprt, nil);
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@ -810,6 +796,7 @@ identify(void)
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if(checksum(rsd, 20) && checksum(rsd, 36))
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return 1;
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addarchfile("acpitbls", 0444, readtbls, nil);
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addarchfile("acpimem", 0600, readmem, writemem);
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if(strcmp(cp, "0") == 0)
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return 1;
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if((cp = getconf("*nomp")) != nil && strcmp(cp, "0") != 0)
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@ -983,15 +970,15 @@ amlmapio(Amlio *io)
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print("amlmapio: address space %x not implemented\n", io->space);
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break;
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case MemSpace:
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if(memcheck(io->off, io->len) != io->len){
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print("amlmapio: [%#p-%#p) overlaps usable memory\n",
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(uintptr)io->off, (uintptr)io->off+io->len);
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break;
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}
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if((io->va = vmap(io->off, io->len)) == nil){
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print("amlmapio: vmap failed\n");
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break;
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}
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if(nmemregs < nelem(memregs)){
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memregs[nmemregs].addr = io->off;
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memregs[nmemregs].size = io->len;
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nmemregs++;
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}
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return 0;
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case IoSpace:
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snprint(buf, sizeof(buf), "%N", io->name);
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