Date: Thu, 28 Oct 2010 22:28:12 +0200 From: Attilio Rao <attilio@freebsd.org> To: John Baldwin <jhb@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r214457 - in head/sys: amd64/amd64 conf i386/i386 x86/x86 Message-ID: <AANLkTi=5oMOtVVVtnuG0BFEnLyzHnParq7QixgMaPJ1m@mail.gmail.com> In-Reply-To: <201010281411.40423.jhb@freebsd.org> References: <201010281631.o9SGVdtZ014923@svn.freebsd.org> <201010281257.05481.jhb@freebsd.org> <AANLkTim_znVvoC0DVygFEu8GPOiwiuNs2fB_iMp61GpA@mail.gmail.com> <201010281411.40423.jhb@freebsd.org>
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2010/10/28 John Baldwin <jhb@freebsd.org>: > On Thursday, October 28, 2010 1:21:34 pm Attilio Rao wrote: >> 2010/10/28 John Baldwin <jhb@freebsd.org>: >> > On Thursday, October 28, 2010 12:31:39 pm Attilio Rao wrote: >> >> Author: attilio >> >> Date: Thu Oct 28 16:31:39 2010 >> >> New Revision: 214457 >> >> URL: http://svn.freebsd.org/changeset/base/214457 >> >> >> >> Log: >> >> =C2=A0 Merge nexus.c from amd64 and i386 to x86 subtree. >> >> >> >> =C2=A0 Sponsored by: =C2=A0 =C2=A0 =C2=A0 Sandvine Incorporated >> >> =C2=A0 Tested by: =C2=A0gianni >> >> >> > >> > It would be better to merge these two routines. =C2=A0The loader now p= asses the >> > smap to i386 kernels as well, so ram_attach() should probably be chang= ed to >> > try the amd64 approach first and if that fails fall back to using the >> > phys_avail[] array instead. >> >> What do you think about this patch?: >> Index: nexus.c >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> --- nexus.c =C2=A0 =C2=A0 (revision 214457) >> +++ nexus.c =C2=A0 =C2=A0 (working copy) >> @@ -52,9 +52,7 @@ >> =C2=A0#include <sys/systm.h> >> =C2=A0#include <sys/bus.h> >> =C2=A0#include <sys/kernel.h> >> -#ifdef __amd64__ >> =C2=A0#include <sys/linker.h> >> -#endif >> =C2=A0#include <sys/malloc.h> >> =C2=A0#include <sys/module.h> >> =C2=A0#include <machine/bus.h> >> @@ -67,12 +65,10 @@ >> =C2=A0#include <vm/pmap.h> >> =C2=A0#include <machine/pmap.h> >> >> -#ifdef __amd64__ >> =C2=A0#include <machine/metadata.h> >> -#include <machine/pc/bios.h> >> -#endif >> =C2=A0#include <machine/nexusvar.h> >> =C2=A0#include <machine/resource.h> >> +#include <machine/pc/bios.h> >> >> =C2=A0#ifdef DEV_APIC >> =C2=A0#include "pcib_if.h" >> @@ -89,11 +85,13 @@ >> =C2=A0#include <sys/rtprio.h> >> >> =C2=A0#ifdef __amd64__ >> -#define =C2=A0 =C2=A0 =C2=A0 =C2=A0RMAN_BUS_SPACE_IO =C2=A0 =C2=A0 =C2= =A0 AMD64_BUS_SPACE_IO >> -#define =C2=A0 =C2=A0 =C2=A0 =C2=A0RMAN_BUS_SPACE_MEM =C2=A0 =C2=A0 =C2= =A0AMD64_BUS_SPACE_MEM >> +#define =C2=A0 =C2=A0 =C2=A0 =C2=A0X86_BUS_SPACE_IO =C2=A0 =C2=A0 =C2= =A0 =C2=A0AMD64_BUS_SPACE_IO >> +#define =C2=A0 =C2=A0 =C2=A0 =C2=A0X86_BUS_SPACE_MEM =C2=A0 =C2=A0 =C2= =A0 AMD64_BUS_SPACE_MEM >> +#define =C2=A0 =C2=A0 =C2=A0 =C2=A0ELF_KERN_STR =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0"elf64 kernel" >> =C2=A0#else >> -#define =C2=A0 =C2=A0 =C2=A0 =C2=A0RMAN_BUS_SPACE_IO =C2=A0 =C2=A0 =C2= =A0 I386_BUS_SPACE_IO >> -#define =C2=A0 =C2=A0 =C2=A0 =C2=A0RMAN_BUS_SPACE_MEM =C2=A0 =C2=A0 =C2= =A0I386_BUS_SPACE_MEM >> +#define =C2=A0 =C2=A0 =C2=A0 =C2=A0X86_BUS_SPACE_IO =C2=A0 =C2=A0 =C2= =A0 =C2=A0I386_BUS_SPACE_IO >> +#define =C2=A0 =C2=A0 =C2=A0 =C2=A0X86_BUS_SPACE_MEM =C2=A0 =C2=A0 =C2= =A0 I386_BUS_SPACE_MEM >> +#define =C2=A0 =C2=A0 =C2=A0 =C2=A0ELF_KERN_STR =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0"elf32 kernel" >> =C2=A0#endif >> @@ -701,16 +699,11 @@ >> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 panic("ram_attach: resource %d failed to attach", rid); >> =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 rid++; >> =C2=A0 =C2=A0 =C2=A0 =C2=A0 } >> - =C2=A0 =C2=A0 =C2=A0 return (0); >> -} >> -#else >> -static int >> -ram_attach(device_t dev) >> -{ >> - =C2=A0 =C2=A0 =C2=A0 struct resource *res; >> - =C2=A0 =C2=A0 =C2=A0 vm_paddr_t *p; >> - =C2=A0 =C2=A0 =C2=A0 int error, i, rid; >> >> + =C2=A0 =C2=A0 =C2=A0 /* If at least one smap attached, return. */ >> + =C2=A0 =C2=A0 =C2=A0 if (rid !=3D 0) >> + =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 return (0); >> + > > Perhaps this instead: > > =C2=A0 =C2=A0 =C2=A0 =C2=A0/* If we found an SMAP, return. */ > =C2=A0 =C2=A0 =C2=A0 =C2=A0if (smapbase !=3D NULL) > =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0return (0); No, I don't think this check is right, smapbase will always be !=3D NULL (otherwise the code panics). Attilio --=20 Peace can only be achieved by understanding - A. Einstein
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