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sparc: remove CONFIG_SUN4

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While doing some easy cleanups on the sparc code I noticed that the
CONFIG_SUN4 code seems to be worse than the rest - there were some
"I don't know how it should work, but the current code definitely cannot
work." places.

And while I have seen people running Linux on machines like a
SPARCstation 5 a few years ago I don't recall having seen sun4
machines, even less ones running Linux.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Adrian Bunk
2008-08-31 20:59:37 -07:00
committed by David S. Miller
parent b69416b51b
commit 5110bd21b8
39 changed files with 80 additions and 1066 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
arch/sparc/kernel/Makefile
View File

@ -18,7 +18,6 @@ obj-y := entry.o wof.o wuf.o etrap.o rtrap.o traps.o $(IRQ_OBJS) \
devres-y = ../../../kernel/irq/devres.o
obj-$(CONFIG_PCI) += pcic.o
obj-$(CONFIG_SUN4) += sun4setup.o
obj-$(CONFIG_SMP) += trampoline.o smp.o sun4m_smp.o sun4d_smp.o
obj-$(CONFIG_SUN_AUXIO) += auxio.o
obj-$(CONFIG_SUN_PM) += apc.o pmc.o

2
arch/sparc/kernel/devices.c
View File

@ -143,7 +143,7 @@ void __init device_scan(void)
#endif
clock_stop_probe();
if (ARCH_SUN4C_SUN4)
if (ARCH_SUN4C)
sun4c_probe_memerr_reg();
return;

54
arch/sparc/kernel/entry.S
View File

@ -20,11 +20,7 @@
#include <asm/memreg.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#ifdef CONFIG_SUN4
#include <asm/pgtsun4.h>
#else
#include <asm/pgtsun4c.h>
#endif
#include <asm/winmacro.h>
#include <asm/signal.h>
#include <asm/obio.h>
@ -775,11 +771,7 @@ vac_linesize_patch_32: subcc %l7, 32, %l7
* Ugly, but we cant use hardware flushing on the sun4 and we'd require
* two instructions (Anton)
*/
#ifdef CONFIG_SUN4
vac_hwflush_patch1_on: nop
#else
vac_hwflush_patch1_on: addcc %l7, -PAGE_SIZE, %l7
#endif
vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG
@ -798,42 +790,10 @@ vac_hwflush_patch2_on: sta %g0, [%l3 + %l7] ASI_HWFLUSHSEG
! %l7 = 1 for textfault
! We want error in %l5, vaddr in %l6
sun4c_fault:
#ifdef CONFIG_SUN4
sethi %hi(sun4c_memerr_reg), %l4
ld [%l4+%lo(sun4c_memerr_reg)], %l4 ! memerr ctrl reg addr
ld [%l4], %l6 ! memerr ctrl reg
ld [%l4 + 4], %l5 ! memerr vaddr reg
andcc %l6, 0x80, %g0 ! check for error type
st %g0, [%l4 + 4] ! clear the error
be 0f ! normal error
sethi %hi(AC_BUS_ERROR), %l4 ! bus err reg addr
call prom_halt ! something weird happened
! what exactly did happen?
! what should we do here?
0: or %l4, %lo(AC_BUS_ERROR), %l4 ! bus err reg addr
lduba [%l4] ASI_CONTROL, %l6 ! bus err reg
cmp %l7, 1 ! text fault?
be 1f ! yes
nop
ld [%l1], %l4 ! load instruction that caused fault
srl %l4, 21, %l4
andcc %l4, 1, %g0 ! store instruction?
be 1f ! no
sethi %hi(SUN4C_SYNC_BADWRITE), %l4 ! yep
! %lo(SUN4C_SYNC_BADWRITE) = 0
or %l4, %l6, %l6 ! set write bit to emulate sun4c
1:
#else
sethi %hi(AC_SYNC_ERR), %l4
add %l4, 0x4, %l6 ! AC_SYNC_VA in %l6
lda [%l6] ASI_CONTROL, %l5 ! Address
lda [%l4] ASI_CONTROL, %l6 ! Error, retained for a bit
#endif
andn %l5, 0xfff, %l5 ! Encode all info into l7
srl %l6, 14, %l4
@ -880,12 +840,7 @@ sun4c_fault:
or %l4, %lo(swapper_pg_dir), %l4
sll %l6, 2, %l6
ld [%l4 + %l6], %l4
#ifdef CONFIG_SUN4
sethi %hi(PAGE_MASK), %l6
andcc %l4, %l6, %g0
#else
andcc %l4, PAGE_MASK, %g0
#endif
be sun4c_fault_fromuser
lduXa [%l5] ASI_SEGMAP, %l4
@ -937,11 +892,7 @@ invalid_segment_patch1:
ld [%l6 + 0x08], %l3 ! tmp = entry->vaddr
! Flush segment from the cache.
#ifdef CONFIG_SUN4
sethi %hi((128 * 1024)), %l7
#else
sethi %hi((64 * 1024)), %l7
#endif
9:
vac_hwflush_patch1:
vac_linesize_patch:
@ -1029,12 +980,7 @@ invalid_segment_patch2:
or %l4, %lo(swapper_pg_dir), %l4
sll %l3, 2, %l3
ld [%l4 + %l3], %l4
#ifndef CONFIG_SUN4
and %l4, PAGE_MASK, %l4
#else
sethi %hi(PAGE_MASK), %l6
and %l4, %l6, %l4
#endif
srl %l5, (PAGE_SHIFT - 2), %l6
and %l6, ((SUN4C_PTRS_PER_PTE - 1) << 2), %l6

28
arch/sparc/kernel/head.S
View File

@ -63,15 +63,9 @@ cputypvar_sun4m:
.align 4
#ifndef CONFIG_SUN4
sun4_notsup:
.asciz "Sparc-Linux sun4 needs a specially compiled kernel, turn CONFIG_SUN4 on.\n\n"
.asciz "Sparc-Linux sun4 support does no longer exist.\n\n"
.align 4
#else
sun4cdm_notsup:
.asciz "Kernel compiled with CONFIG_SUN4 cannot run on SUN4C/SUN4M/SUN4D\nTurn CONFIG_SUN4 off.\n\n"
.align 4
#endif
sun4e_notsup:
.asciz "Sparc-Linux sun4e support does not exist\n\n"
@ -780,15 +774,6 @@ execute_in_high_mem:
nop
found_version:
#ifdef CONFIG_SUN4
/* For people who try sun4 kernels, even if Configure.help advises them. */
ld [%g7 + 0x68], %o1
set sun4cdm_notsup, %o0
call %o1
nop
b halt_me
nop
#endif
/* Get the machine type via the mysterious romvec node operations. */
add %g7, 0x1c, %l1
@ -1150,15 +1135,6 @@ sun4c_continue_boot:
nop
sun4_init:
#ifdef CONFIG_SUN4
/* There, happy now Adrian? */
set cputypval, %o2 ! Let everyone know we
set ' ', %o0 ! are a "sun4 " architecture
stb %o0, [%o2 + 0x4]
b got_prop
nop
#else
sethi %hi(SUN4_PROM_VECTOR+0x84), %o1
ld [%o1 + %lo(SUN4_PROM_VECTOR+0x84)], %o1
set sun4_notsup, %o0
@ -1170,7 +1146,7 @@ sun4_init:
nop
1: ba 1b ! Cannot exit into KMON
nop
#endif
no_sun4e_here:
ld [%g7 + 0x68], %o1
set sun4e_notsup, %o0

7
arch/sparc/kernel/idprom.c
View File

@ -12,10 +12,6 @@
#include <asm/oplib.h>
#include <asm/idprom.h>
#include <asm/machines.h> /* Fun with Sun released architectures. */
#ifdef CONFIG_SUN4
#include <asm/sun4paddr.h>
extern void sun4setup(void);
#endif
struct idprom *idprom;
static struct idprom idprom_buffer;
@ -101,7 +97,4 @@ void __init idprom_init(void)
idprom->id_ethaddr[0], idprom->id_ethaddr[1],
idprom->id_ethaddr[2], idprom->id_ethaddr[3],
idprom->id_ethaddr[4], idprom->id_ethaddr[5]);
#ifdef CONFIG_SUN4
sun4setup();
#endif
}

2
arch/sparc/kernel/process.c
View File

@ -75,7 +75,7 @@ void cpu_idle(void)
{
/* endless idle loop with no priority at all */
for (;;) {
if (ARCH_SUN4C_SUN4) {
if (ARCH_SUN4C) {
static int count = HZ;
static unsigned long last_jiffies;
static unsigned long last_faults;

1
arch/sparc/kernel/prom.c
View File

@ -442,7 +442,6 @@ static void __init of_console_init(void)
switch (prom_vers) {
case PROM_V0:
case PROM_SUN4:
skip = 0;
switch (*romvec->pv_stdout) {
case PROMDEV_SCREEN:

8
arch/sparc/kernel/setup.c
View File

@ -224,12 +224,6 @@ void __init setup_arch(char **cmdline_p)
if(!strcmp(&cputypval,"sun4e")) { sparc_cpu_model=sun4e; }
if(!strcmp(&cputypval,"sun4u")) { sparc_cpu_model=sun4u; }
#ifdef CONFIG_SUN4
if (sparc_cpu_model != sun4) {
prom_printf("This kernel is for Sun4 architecture only.\n");
prom_halt();
}
#endif
printk("ARCH: ");
switch(sparc_cpu_model) {
case sun4:
@ -263,7 +257,7 @@ void __init setup_arch(char **cmdline_p)
boot_flags_init(*cmdline_p);
idprom_init();
if (ARCH_SUN4C_SUN4)
if (ARCH_SUN4C)
sun4c_probe_vac();
load_mmu();

54
arch/sparc/kernel/sun4c_irq.c
View File

@ -33,7 +33,6 @@
#include <asm/traps.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/sun4paddr.h>
#include <asm/idprom.h>
#include <asm/machines.h>
@ -130,22 +129,10 @@ static void sun4c_enable_irq(unsigned int irq_nr)
volatile struct sun4c_timer_info *sun4c_timers;
#ifdef CONFIG_SUN4
/* This is an ugly hack to work around the
current timer code, and make it work with
the sun4/260 intersil
*/
volatile struct sun4c_timer_info sun4_timer;
#endif
static void sun4c_clear_clock_irq(void)
{
volatile unsigned int clear_intr;
#ifdef CONFIG_SUN4
if (idprom->id_machtype == (SM_SUN4 | SM_4_260))
clear_intr = sun4_timer.timer_limit10;
else
#endif
clear_intr = sun4c_timers->timer_limit10;
}
@ -166,11 +153,6 @@ static void __init sun4c_init_timers(irq_handler_t counter_fn)
/* Map the Timer chip, this is implemented in hardware inside
* the cache chip on the sun4c.
*/
#ifdef CONFIG_SUN4
if (idprom->id_machtype == (SM_SUN4 | SM_4_260))
sun4c_timers = &sun4_timer;
else
#endif
sun4c_timers = ioremap(SUN_TIMER_PHYSADDR,
sizeof(struct sun4c_timer_info));
@ -206,28 +188,22 @@ void __init sun4c_init_IRQ(void)
{
struct linux_prom_registers int_regs[2];
int ie_node;
struct resource phyres;
if (ARCH_SUN4) {
interrupt_enable = (char *)
ioremap(sun4_ie_physaddr, PAGE_SIZE);
} else {
struct resource phyres;
ie_node = prom_searchsiblings (prom_getchild(prom_root_node),
"interrupt-enable");
if(ie_node == 0)
panic("Cannot find /interrupt-enable node");
ie_node = prom_searchsiblings (prom_getchild(prom_root_node),
"interrupt-enable");
if(ie_node == 0)
panic("Cannot find /interrupt-enable node");
/* Depending on the "address" property is bad news... */
interrupt_enable = NULL;
if (prom_getproperty(ie_node, "reg", (char *) int_regs,
sizeof(int_regs)) != -1) {
memset(&phyres, 0, sizeof(struct resource));
phyres.flags = int_regs[0].which_io;
phyres.start = int_regs[0].phys_addr;
interrupt_enable = (char *) of_ioremap(&phyres, 0,
int_regs[0].reg_size, "sun4c_intr");
}
/* Depending on the "address" property is bad news... */
interrupt_enable = NULL;
if (prom_getproperty(ie_node, "reg", (char *) int_regs,
sizeof(int_regs)) != -1) {
memset(&phyres, 0, sizeof(struct resource));
phyres.flags = int_regs[0].which_io;
phyres.start = int_regs[0].phys_addr;
interrupt_enable = (char *) of_ioremap(&phyres, 0,
int_regs[0].reg_size, "sun4c_intr");
}
if (!interrupt_enable)
panic("Cannot map interrupt_enable");

75
arch/sparc/kernel/sun4setup.c
View File

@ -1,75 +0,0 @@
/* sun4setup.c: Setup the hardware address of various items in the sun4
* architecture. Called from idprom_init
*
* Copyright (C) 1998 Chris G. Davis (cdavis@cois.on.ca)
*/
#include <asm/page.h>
#include <asm/oplib.h>
#include <asm/idprom.h>
#include <asm/sun4paddr.h>
#include <asm/machines.h>
int sun4_memreg_physaddr;
int sun4_ie_physaddr;
int sun4_clock_physaddr;
int sun4_timer_physaddr;
int sun4_eth_physaddr;
int sun4_si_physaddr;
int sun4_bwtwo_physaddr;
int sun4_zs0_physaddr;
int sun4_zs1_physaddr;
int sun4_dma_physaddr;
int sun4_esp_physaddr;
int sun4_ie_physaddr;
void __init sun4setup(void)
{
printk("Sun4 Hardware Setup v1.0 18/May/98 Chris Davis (cdavis@cois.on.ca). ");
/*
setup standard sun4 info
*/
sun4_ie_physaddr=SUN4_IE_PHYSADDR;
/*
setup model specific info
*/
switch(idprom->id_machtype) {
case (SM_SUN4 | SM_4_260 ):
printk("Setup for a SUN4/260\n");
sun4_memreg_physaddr=SUN4_200_MEMREG_PHYSADDR;
sun4_clock_physaddr=SUN4_200_CLOCK_PHYSADDR;
sun4_timer_physaddr=SUN4_UNUSED_PHYSADDR;
sun4_eth_physaddr=SUN4_200_ETH_PHYSADDR;
sun4_si_physaddr=SUN4_200_SI_PHYSADDR;
sun4_bwtwo_physaddr=SUN4_200_BWTWO_PHYSADDR;
sun4_dma_physaddr=SUN4_UNUSED_PHYSADDR;
sun4_esp_physaddr=SUN4_UNUSED_PHYSADDR;
break;
case (SM_SUN4 | SM_4_330 ):
printk("Setup for a SUN4/330\n");
sun4_memreg_physaddr=SUN4_300_MEMREG_PHYSADDR;
sun4_clock_physaddr=SUN4_300_CLOCK_PHYSADDR;
sun4_timer_physaddr=SUN4_300_TIMER_PHYSADDR;
sun4_eth_physaddr=SUN4_300_ETH_PHYSADDR;
sun4_si_physaddr=SUN4_UNUSED_PHYSADDR;
sun4_bwtwo_physaddr=SUN4_300_BWTWO_PHYSADDR;
sun4_dma_physaddr=SUN4_300_DMA_PHYSADDR;
sun4_esp_physaddr=SUN4_300_ESP_PHYSADDR;
break;
case (SM_SUN4 | SM_4_470 ):
printk("Setup for a SUN4/470\n");
sun4_memreg_physaddr=SUN4_400_MEMREG_PHYSADDR;
sun4_clock_physaddr=SUN4_400_CLOCK_PHYSADDR;
sun4_timer_physaddr=SUN4_400_TIMER_PHYSADDR;
sun4_eth_physaddr=SUN4_400_ETH_PHYSADDR;
sun4_si_physaddr=SUN4_UNUSED_PHYSADDR;
sun4_bwtwo_physaddr=SUN4_400_BWTWO_PHYSADDR;
sun4_dma_physaddr=SUN4_400_DMA_PHYSADDR;
sun4_esp_physaddr=SUN4_400_ESP_PHYSADDR;
break;
default:
;
}
}

8
arch/sparc/kernel/sys_sparc.c
View File

@ -53,7 +53,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
/* See asm-sparc/uaccess.h */
if (len > TASK_SIZE - PAGE_SIZE)
return -ENOMEM;
if (ARCH_SUN4C_SUN4 && len > 0x20000000)
if (ARCH_SUN4C && len > 0x20000000)
return -ENOMEM;
if (!addr)
addr = TASK_UNMAPPED_BASE;
@ -65,7 +65,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
/* At this point: (!vmm || addr < vmm->vm_end). */
if (ARCH_SUN4C_SUN4 && addr < 0xe0000000 && 0x20000000 - len < addr) {
if (ARCH_SUN4C && addr < 0xe0000000 && 0x20000000 - len < addr) {
addr = PAGE_OFFSET;
vmm = find_vma(current->mm, PAGE_OFFSET);
}
@ -81,7 +81,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi
asmlinkage unsigned long sparc_brk(unsigned long brk)
{
if(ARCH_SUN4C_SUN4) {
if(ARCH_SUN4C) {
if ((brk & 0xe0000000) != (current->mm->brk & 0xe0000000))
return current->mm->brk;
}
@ -221,7 +221,7 @@ out:
int sparc_mmap_check(unsigned long addr, unsigned long len)
{
if (ARCH_SUN4C_SUN4 &&
if (ARCH_SUN4C &&
(len > 0x20000000 ||
(addr < 0xe0000000 && addr + len > 0x20000000)))
return -EINVAL;

162
arch/sparc/kernel/time.c
View File

@ -39,7 +39,6 @@
#include <asm/io.h>
#include <asm/idprom.h>
#include <asm/machines.h>
#include <asm/sun4paddr.h>
#include <asm/page.h>
#include <asm/pcic.h>
#include <asm/irq_regs.h>
@ -54,27 +53,6 @@ static struct mostek48t08 __iomem *mstk48t08_regs = NULL;
static int set_rtc_mmss(unsigned long);
static int sbus_do_settimeofday(struct timespec *tv);
#ifdef CONFIG_SUN4
struct intersil *intersil_clock;
#define intersil_cmd(intersil_reg, intsil_cmd) intersil_reg->int_cmd_reg = \
(intsil_cmd)
#define intersil_intr(intersil_reg, intsil_cmd) intersil_reg->int_intr_reg = \
(intsil_cmd)
#define intersil_start(intersil_reg) intersil_cmd(intersil_reg, \
( INTERSIL_START | INTERSIL_32K | INTERSIL_NORMAL | INTERSIL_24H |\
INTERSIL_INTR_ENABLE))
#define intersil_stop(intersil_reg) intersil_cmd(intersil_reg, \
( INTERSIL_STOP | INTERSIL_32K | INTERSIL_NORMAL | INTERSIL_24H |\
INTERSIL_INTR_ENABLE))
#define intersil_read_intr(intersil_reg, towhere) towhere = \
intersil_reg->int_intr_reg
#endif
unsigned long profile_pc(struct pt_regs *regs)
{
extern char __copy_user_begin[], __copy_user_end[];
@ -117,15 +95,7 @@ static irqreturn_t timer_interrupt(int dummy, void *dev_id)
/* Protect counter clear so that do_gettimeoffset works */
write_seqlock(&xtime_lock);
#ifdef CONFIG_SUN4
if((idprom->id_machtype == (SM_SUN4 | SM_4_260)) ||
(idprom->id_machtype == (SM_SUN4 | SM_4_110))) {
int temp;
intersil_read_intr(intersil_clock, temp);
/* re-enable the irq */
enable_pil_irq(10);
}
#endif
clear_clock_irq();
do_timer(1);
@ -250,55 +220,6 @@ static void __devinit mostek_set_system_time(void)
spin_unlock_irq(&mostek_lock);
}
/* Probe for the real time clock chip on Sun4 */
static inline void sun4_clock_probe(void)
{
#ifdef CONFIG_SUN4
int temp;
struct resource r;
memset(&r, 0, sizeof(r));
if( idprom->id_machtype == (SM_SUN4 | SM_4_330) ) {
sp_clock_typ = MSTK48T02;
r.start = sun4_clock_physaddr;
mstk48t02_regs = of_ioremap(&r, 0,
sizeof(struct mostek48t02), NULL);
mstk48t08_regs = NULL; /* To catch weirdness */
intersil_clock = NULL; /* just in case */
/* Kick start the clock if it is completely stopped. */
if (mostek_read(mstk48t02_regs + MOSTEK_SEC) & MSTK_STOP)
kick_start_clock();
} else if( idprom->id_machtype == (SM_SUN4 | SM_4_260)) {
/* intersil setup code */
printk("Clock: INTERSIL at %8x ",sun4_clock_physaddr);
sp_clock_typ = INTERSIL;
r.start = sun4_clock_physaddr;
intersil_clock = (struct intersil *)
of_ioremap(&r, 0, sizeof(*intersil_clock), "intersil");
mstk48t02_regs = 0; /* just be sure */
mstk48t08_regs = NULL; /* ditto */
/* initialise the clock */
intersil_intr(intersil_clock,INTERSIL_INT_100HZ);
intersil_start(intersil_clock);
intersil_read_intr(intersil_clock, temp);
while (!(temp & 0x80))
intersil_read_intr(intersil_clock, temp);
intersil_read_intr(intersil_clock, temp);
while (!(temp & 0x80))
intersil_read_intr(intersil_clock, temp);
intersil_stop(intersil_clock);
}
#endif
}
#ifndef CONFIG_SUN4
static int __devinit clock_probe(struct of_device *op, const struct of_device_id *match)
{
struct device_node *dp = op->node;
@ -365,7 +286,6 @@ static int __init clock_init(void)
* need to see the clock registers.
*/
fs_initcall(clock_init);
#endif /* !CONFIG_SUN4 */
static void __init sbus_time_init(void)
{
@ -373,51 +293,8 @@ static void __init sbus_time_init(void)
BTFIXUPSET_CALL(bus_do_settimeofday, sbus_do_settimeofday, BTFIXUPCALL_NORM);
btfixup();
if (ARCH_SUN4)
sun4_clock_probe();
sparc_init_timers(timer_interrupt);
#ifdef CONFIG_SUN4
if(idprom->id_machtype == (SM_SUN4 | SM_4_330)) {
mostek_set_system_time();
} else if(idprom->id_machtype == (SM_SUN4 | SM_4_260) ) {
/* initialise the intersil on sun4 */
unsigned int year, mon, day, hour, min, sec;
int temp;
struct intersil *iregs;
iregs=intersil_clock;
if(!iregs) {
prom_printf("Something wrong, clock regs not mapped yet.\n");
prom_halt();
}
intersil_intr(intersil_clock,INTERSIL_INT_100HZ);
disable_pil_irq(10);
intersil_stop(iregs);
intersil_read_intr(intersil_clock, temp);
temp = iregs->clk.int_csec;
sec = iregs->clk.int_sec;
min = iregs->clk.int_min;
hour = iregs->clk.int_hour;
day = iregs->clk.int_day;
mon = iregs->clk.int_month;
year = MSTK_CVT_YEAR(iregs->clk.int_year);
enable_pil_irq(10);
intersil_start(iregs);
xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
printk("%u/%u/%u %u:%u:%u\n",day,mon,year,hour,min,sec);
}
#endif
/* Now that OBP ticker has been silenced, it is safe to enable IRQ. */
local_irq_enable();
}
@ -532,43 +409,6 @@ static int set_rtc_mmss(unsigned long nowtime)
int real_seconds, real_minutes, mostek_minutes;
struct mostek48t02 *regs = (struct mostek48t02 *)mstk48t02_regs;
unsigned long flags;
#ifdef CONFIG_SUN4
struct intersil *iregs = intersil_clock;
int temp;
#endif
/* Not having a register set can lead to trouble. */
if (!regs) {
#ifdef CONFIG_SUN4
if(!iregs)
return -1;
else {
temp = iregs->clk.int_csec;
mostek_minutes = iregs->clk.int_min;
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - mostek_minutes) + 15)/30) & 1)
real_minutes += 30; /* correct for half hour time zone */
real_minutes %= 60;
if (abs(real_minutes - mostek_minutes) < 30) {
intersil_stop(iregs);
iregs->clk.int_sec=real_seconds;
iregs->clk.int_min=real_minutes;
intersil_start(iregs);
} else {
printk(KERN_WARNING
"set_rtc_mmss: can't update from %d to %d\n",
mostek_minutes, real_minutes);
return -1;
}
return 0;
}
#endif
}
spin_lock_irqsave(&mostek_lock, flags);
/* Read the current RTC minutes. */