Date: Tue, 1 Mar 2011 03:25:18 +0000 (UTC) From: "Jayachandran C." <jchandra@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r219121 - head/sys/mips/mips Message-ID: <201103010325.p213PImX079252@svn.freebsd.org>
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Author: jchandra Date: Tue Mar 1 03:25:18 2011 New Revision: 219121 URL: http://svn.freebsd.org/changeset/base/219121 Log: Use new thread's stack to invoke pmap_activate in cpu_switch() Restore the SP from the new thread's PCB before calling pmap_activate. Remove some old FIXME comments. Modified: head/sys/mips/mips/swtch.S Modified: head/sys/mips/mips/swtch.S ============================================================================== --- head/sys/mips/mips/swtch.S Tue Mar 1 00:37:46 2011 (r219120) +++ head/sys/mips/mips/swtch.S Tue Mar 1 03:25:18 2011 (r219121) @@ -195,11 +195,6 @@ LEAF(savectx) SAVE_U_PCB_CONTEXT(ra, PREG_PC, a0) move ra, v0 /* restore 'ra' before returning */ - /* - * FREEBSD_DEVELOPERS_FIXME: - * In case there are CPU-specific registers that need - * to be saved with the other registers do so here. - */ j ra move v0, zero END(savectx) @@ -254,11 +249,6 @@ NON_LEAF(cpu_switch, CALLFRAME_SIZ, ra) nop getpc: SAVE_U_PCB_CONTEXT(ra, PREG_PC, a0) # save return address - /* - * FREEBSD_DEVELOPERS_FIXME: - * In case there are CPU-specific registers that need - * to be saved with the other registers do so here. - */ PTR_S a2, TD_LOCK(a3) # Switchout td_lock @@ -328,13 +318,15 @@ entry0set: * Now running on new u struct. */ sw2: + PTR_L s0, TD_PCB(s7) + RESTORE_U_PCB_CONTEXT(sp, PREG_SP, s0) PTR_LA t1, _C_LABEL(pmap_activate) # s7 = new proc pointer jalr t1 # s7 = new proc pointer move a0, s7 # BDSLOT /* * Restore registers and return. */ - PTR_L a0, TD_PCB(s7) + move a0, s0 RESTORE_U_PCB_CONTEXT(gp, PREG_GP, a0) RESTORE_U_PCB_CONTEXT(v0, PREG_SR, a0) # restore kernel context RESTORE_U_PCB_CONTEXT(ra, PREG_RA, a0) @@ -346,13 +338,8 @@ sw2: RESTORE_U_PCB_CONTEXT(s5, PREG_S5, a0) RESTORE_U_PCB_CONTEXT(s6, PREG_S6, a0) RESTORE_U_PCB_CONTEXT(s7, PREG_S7, a0) - RESTORE_U_PCB_CONTEXT(sp, PREG_SP, a0) RESTORE_U_PCB_CONTEXT(s8, PREG_S8, a0) - /* - * FREEBSD_DEVELOPERS_FIXME: - * In case there are CPU-specific registers that need - * to be restored with the other registers do so here. - */ + mfc0 t0, MIPS_COP_0_STATUS and t0, t0, MIPS_SR_INT_MASK and v0, v0, ~MIPS_SR_INT_MASK
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