MIPS: SB1: Remove support for Pass 1 parts.

Pass 1 parts had a number of significant erratas and were only available
in small numbers and under NDA.  Full support also required the use of a
special toolchain that kept branches properly aligned.  These workarounds
were never upstreamed and the only toolchain known to have them is
Montavista's GCC 3.0-based toolchain which completly obsoleted if not
useless these days.

So now that automated testing has tripped over the user of the
-msb1-pass1-workarounds option, rather than fixing it remove support for
pass 1 parts.

Probably nobody will notice.  I seem to own the last know pass 1 board
and I haven't noticed another one in the wild in the past decade, at
least.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

6 files changed, 2 insertions, 25 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 66dc359277e3..cee5f93e5712 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2263,11 +2263,6 @@ config MIPS_CM
 config MIPS_CPC
         bool
 
-config SB1_PASS_1_WORKAROUNDS
-        bool
-        depends on CPU_SB1_PASS_1
-        default y
-
 config SB1_PASS_2_WORKAROUNDS
         bool
         depends on CPU_SB1 && (CPU_SB1_PASS_2_2 || CPU_SB1_PASS_2)
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index ae2dd59050f7..252e347958f3 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -181,13 +181,6 @@ cflags-$(CONFIG_CPU_R4000_WORKAROUNDS)	+= $(call cc-option,-mfix-r4000,)
 cflags-$(CONFIG_CPU_R4400_WORKAROUNDS)  += $(call cc-option,-mfix-r4400,)
 cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS)  += $(call cc-option,-mno-daddi,)
 
-ifdef CONFIG_CPU_SB1
-ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
-KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
-KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
-endif
-endif
-
 # For smartmips configurations, there are hundreds of warnings due to ISA overrides
 # in assembly and header files. smartmips is only supported for MIPS32r1 onwards
 # and there is no support for 64-bit. Various '.set mips2' or '.set mips3' or
diff --git a/arch/mips/include/asm/mach-sibyte/war.h b/arch/mips/include/asm/mach-sibyte/war.h
index 0a227d426b9c..520f8fc2c806 100644
--- a/arch/mips/include/asm/mach-sibyte/war.h
+++ b/arch/mips/include/asm/mach-sibyte/war.h
@@ -13,8 +13,7 @@
 #define R4600_V2_HIT_CACHEOP_WAR        0
 #define R5432_CP0_INTERRUPT_WAR         0
 
-#if defined(CONFIG_SB1_PASS_1_WORKAROUNDS) || \
-    defined(CONFIG_SB1_PASS_2_WORKAROUNDS)
+#if defined(CONFIG_SB1_PASS_2_WORKAROUNDS)
 
 #ifndef __ASSEMBLY__
 extern int sb1250_m3_workaround_needed(void);
diff --git a/arch/mips/sibyte/Kconfig b/arch/mips/sibyte/Kconfig
index a8bb972fd9fd..cb9a095f5c5e 100644
--- a/arch/mips/sibyte/Kconfig
+++ b/arch/mips/sibyte/Kconfig
@@ -81,11 +81,6 @@ choice
         prompt "SiByte SOC Stepping"
         depends on SIBYTE_SB1xxx_SOC
 
-config CPU_SB1_PASS_1
-        bool "1250 Pass1"
-        depends on SIBYTE_SB1250
-        select CPU_HAS_PREFETCH
-
 config CPU_SB1_PASS_2_1250
         bool "1250 An"
         depends on SIBYTE_SB1250
diff --git a/arch/mips/sibyte/common/bus_watcher.c b/arch/mips/sibyte/common/bus_watcher.c
index 5581844c9194..41a1d2242211 100644
--- a/arch/mips/sibyte/common/bus_watcher.c
+++ b/arch/mips/sibyte/common/bus_watcher.c
@@ -81,10 +81,7 @@ void check_bus_watcher(void)
 {
         u32 status, l2_err, memio_err;
 
-#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
-        /* Destructive read, clears register and interrupt */
-        status = csr_in32(IOADDR(A_SCD_BUS_ERR_STATUS));
-#elif defined(CONFIG_SIBYTE_BCM112X) || defined(CONFIG_SIBYTE_SB1250)
+#if defined(CONFIG_SIBYTE_BCM112X) || defined(CONFIG_SIBYTE_SB1250)
         /* Use non-destructive register */
         status = csr_in32(IOADDR(A_SCD_BUS_ERR_STATUS_DEBUG));
 #elif defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
diff --git a/arch/mips/sibyte/sb1250/setup.c b/arch/mips/sibyte/sb1250/setup.c
index 3c02b2a77ae9..9d3c24efdf4a 100644
--- a/arch/mips/sibyte/sb1250/setup.c
+++ b/arch/mips/sibyte/sb1250/setup.c
@@ -202,12 +202,10 @@ void __init sb1250_setup(void)
 
         switch (war_pass) {
         case K_SYS_REVISION_BCM1250_PASS1:
-#ifndef CONFIG_SB1_PASS_1_WORKAROUNDS
                 printk("@@@@ This is a BCM1250 A0-A2 (Pass 1) board, "
                             "and the kernel doesn't have the proper "
                             "workarounds compiled in. @@@@\n");
                 bad_config = 1;
-#endif
                 break;
         case K_SYS_REVISION_BCM1250_PASS2:
                 /* Pass 2 - easiest as default for now - so many numbers */