[src/trunk]: src/sys/arch/mips/rmi - add cpu_rmixl_run(), and set in mips_loc...

[cliff <cliff%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e6c877e8d155
branches:  trunk
changeset: 764210:e6c877e8d155
user:      cliff <cliff%NetBSD.org@localhost>
date:      Thu Apr 14 05:12:58 2011 +0000

description:
- add cpu_rmixl_run(), and set in mips_locoresw.lsw_cpu_run
to be called from cpu_hatch() once cpus are running,
so we can determine what threads are configured
and running, and can finish initialization of per-core registers
depending on that.
- in cpu_rmixl_db_watch_init() clear IEU_DEFEATURE[DBE],
and init all COP0 watchpoint regs
- option MIPS_DDB_WATCH is deprecated, removed; use of cpu watchpoints
is longer depends on that or DDB

diffstat:

 sys/arch/mips/rmi/rmixl_cpu.c |  38 +++++++++++++++++++++++++++-----------
 1 files changed, 27 insertions(+), 11 deletions(-)

diffs (113 lines):

diff -r 72e09faf432e -r e6c877e8d155 sys/arch/mips/rmi/rmixl_cpu.c
--- a/sys/arch/mips/rmi/rmixl_cpu.c     Thu Apr 14 05:10:04 2011 +0000
+++ b/sys/arch/mips/rmi/rmixl_cpu.c     Thu Apr 14 05:12:58 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rmixl_cpu.c,v 1.2 2011/02/20 07:48:37 matt Exp $       */
+/*     $NetBSD: rmixl_cpu.c,v 1.3 2011/04/14 05:12:58 cliff Exp $      */
 
 /*
  * Copyright 2002 Wasabi Systems, Inc.
@@ -38,7 +38,7 @@
 #include "locators.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rmixl_cpu.c,v 1.2 2011/02/20 07:48:37 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rmixl_cpu.c,v 1.3 2011/04/14 05:12:58 cliff Exp $");
 
 #include "opt_multiprocessor.h"
 #include "opt_ddb.h"
@@ -78,6 +78,7 @@
 
 #ifdef MULTIPROCESSOR
 void           cpu_rmixl_hatch(struct cpu_info *);
+void           cpu_rmixl_run(struct cpu_info *);
 #if 0
 static void    cpu_setup_trampoline_ipi(struct device *, struct cpu_info *);
 #endif
@@ -98,19 +99,25 @@
 static struct rmixl_cpu_trampoline_args rmixl_cpu_trampoline_args;
 #endif
 
-#if defined(DDB) && defined(MIPS_DDB_WATCH)
 /*
  * cpu_rmixl_db_watch_init - initialize COP0 watchpoint stuff
  *
  * clear IEU_DEFEATURE[DBE] to ensure T_WATCH on watchpoint exception
  * set COP0 watchhi and watchlo
+ *
+ * disable all watchpoints
  */
 static void
 cpu_rmixl_db_watch_init(void)
 {
-       db_mach_watch_set_all();
+       uint32_t r;
+
+       r = rmixl_mfcr(RMIXL_PCR_IEU_DEFEATURE);
+       r &= ~__BIT(7);         /* DBE */
+       rmixl_mtcr(RMIXL_PCR_IEU_DEFEATURE, r);
+
+       cpuwatch_clr_all();
 }
-#endif /* DDB && MIPS_DDB_WATCH */
 
 /*
  * cpu_xls616_erratum
@@ -186,6 +193,7 @@
 
 #ifdef MULTIPROCESSOR
                mips_locoresw.lsw_cpu_init = cpu_rmixl_hatch;
+               mips_locoresw.lsw_cpu_run = cpu_rmixl_run;
        } else {
                struct cpucore_attach_args *ca = aux;
                struct cpucore_softc * const ccsc = device_private(parent);
@@ -255,9 +263,7 @@
        asm volatile("dmfc0 %0, $15, 1;" : "=r"(ebase));
        ci->ci_cpuid = ebase & __BITS(9,0);
 
-#if defined(DDB) && defined(MIPS_DDB_WATCH)
        cpu_rmixl_db_watch_init();
-#endif
 
        rmixl_fmn_init();
 
@@ -295,6 +301,18 @@
 
 #ifdef MULTIPROCESSOR
 /*
+ * cpu_rmixl_run
+ *
+ * - chip-specific post-running code called from cpu_hatch via lsw_cpu_run
+ */
+void
+cpu_rmixl_run(struct cpu_info *ci)
+{
+       struct rmixl_cpu_softc * const sc = (void *)ci->ci_softc;
+       cpucore_rmixl_run(device_parent(sc->sc_dev));
+}
+
+/*
  * cpu_rmixl_hatch
  *
  * - chip-specific hatch code called from cpu_hatch via lsw_cpu_init
@@ -318,9 +336,7 @@
 
        cpucore_rmixl_hatch(device_parent(sc->sc_dev));
 
-#if defined(DDB) && defined(MIPS_DDB_WATCH)
        cpu_rmixl_db_watch_init();
-#endif
 }
 
 static int
@@ -359,8 +375,8 @@
         *   RMI firmware only passes the lower 32-bit half of 'ta'
         *   to rmixl_cpu_trampoline (the upper half is clear)
         *   so rmixl_cpu_trampoline must reconstruct the missing upper half
-        *   rmixl_cpu_trampoline "knows" to use MIPS_KSEG0_START
-        *   to reconstruct upper half of 'ta'.
+        *   rmixl_cpu_trampoline "knows" 'ta' is a KSEG0 address
+        *   and sign-extends to make an LP64 KSEG0 address.
         */
        KASSERT(MIPS_KSEG0_P(ta));