Date: Thu, 15 Nov 2012 20:51:57 +0000 (UTC) From: "Cherry G. Mathew" <cherry@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r243103 - projects/amd64_xen_pv/sys/amd64/xen Message-ID: <201211152051.qAFKpvmC053594@svn.freebsd.org>
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Author: cherry Date: Thu Nov 15 20:51:57 2012 New Revision: 243103 URL: http://svnweb.freebsd.org/changeset/base/243103 Log: Setup and load initial thread0 VA context (stack frame, paging, segments) Approved by: gibbs(implicit) Modified: projects/amd64_xen_pv/sys/amd64/xen/machdep.c Modified: projects/amd64_xen_pv/sys/amd64/xen/machdep.c ============================================================================== --- projects/amd64_xen_pv/sys/amd64/xen/machdep.c Thu Nov 15 20:50:18 2012 (r243102) +++ projects/amd64_xen_pv/sys/amd64/xen/machdep.c Thu Nov 15 20:51:57 2012 (r243103) @@ -120,6 +120,8 @@ vm_paddr_t dump_avail[PHYSMAP_SIZE + 2]; struct kva_md_info kmi; +static struct trapframe proc0_tf; + struct pcpu __pcpu[MAXCPU]; struct user_segment_descriptor gdt[512] @@ -358,6 +360,7 @@ vm_paddr_t initxen(struct start_info *si) { + char *env; caddr_t kmdp; size_t kstack0_sz; struct pcpu *pc; @@ -520,6 +523,7 @@ initxen(struct start_info *si) init_param2(physmem); + bzero(msgbufp, msgbufsize); msgbufinit(msgbufp, msgbufsize); //fpuinit(); XXX: TODO @@ -543,6 +547,20 @@ initxen(struct start_info *si) _ufssel = GSEL(GUFS32_SEL, SEL_UPL); _ugssel = GSEL(GUGS32_SEL, SEL_UPL); + /* Load thread0 context */ + load_ds(_udatasel); + load_es(_udatasel); + load_fs(_ufssel); + + /* setup proc 0's pcb */ + thread0.td_pcb->pcb_flags = 0; + thread0.td_pcb->pcb_cr3 = KPML4phys; + thread0.td_frame = &proc0_tf; + + env = getenv("kernelname"); + if (env != NULL) + strlcpy(kernelname, env, sizeof(kernelname)); + return (u_int64_t) thread0.td_pcb & ~0xFul /* 16 byte aligned */; }
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