[U-Boot] [PATCH 1/1] omap3: remove copy&paste global arm interrupts code

[Dirk Behme <dirk.behme@googlemail.com>]

Dear Jean-Christophe,

Dirk Behme wrote:
> Dear Jean-Christophe,
> 
> unfortunately, it's my feeling that this patch is impolite and makes me 
> angry :(
> 
> I know, there should be no top posting, but hopefully it helps to make 
> it clearer:
> 
> You tried this already! I asked several (*) times to just give us the 
> file name where you think the first/original/copy source code of this is 
> so that we can review if there are any differences. There was no answer 
> for this filename question. It was then removed from pull request (what 
> was fine). And now you try it again without any further comments :(
> 
> (*) I can find ~4 (!) requests for the filename (complete history in 
> brackets):
> 
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049736.html )
> http://lists.denx.de/pipermail/u-boot/2009-March/049758.html
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049761.html )
> http://lists.denx.de/pipermail/u-boot/2009-March/049762.html
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049815.html )
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049859.html )
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049858.html )
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049861.html )
> http://lists.denx.de/pipermail/u-boot/2009-March/049883.html
> ( http://lists.denx.de/pipermail/u-boot/2009-March/049887.html )
> http://lists.denx.de/pipermail/u-boot/2009-March/049943.html
> ( http://lists.denx.de/pipermail/u-boot/2009-April/050133.html )
> 
> To make it clear: I'm not basically against the removal of this code. 
> But we have to review it first with the first/original/copy source code 
> to be sure there are no differences and we don't remove any valuable code.
> 
> What's so difficult to just mention "original code is in file xxx"?

After some guessing, it seems to me that the the never given answer 
might be "Please have a look to the interrupt implementation in file 
lib_arm/interrupts.c".

Looking at lib_arm/interrupts.c, yes you are right, the code is 
identical. With this, we can be sure that (TI's) copy & paste doesn't 
add some valuable code to cpu/arm_cortexa8/omap3/interrupts.c.

Do you like to resend this as independent patch, doing the removal at 
  cpu/arm_cortexa8/omap3/interrupts.c (and not non-existing timer.c 
like below)? After this, the rename of 
cpu/arm_cortexa8/omap3/interrupts.c to cpu/arm_cortexa8/omap3/timer.c 
will be fine, too.

So two patches, the first with the removal and the second with rename 
(and Makefile adaption for this) would be nice.

As git commit message for the first patch I propose something like 
"Remove duplicated interrupt code. Original, identical code can be 
found in lib_arm/interrupts.c".

Do you have an OMAP3 based board for testing? If not, let me know, I 
can test the both patches then.

Best regards

Dirk

> Jean-Christophe PLAGNIOL-VILLARD wrote:
>> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
>> ---
>>  cpu/arm_cortexa8/omap3/timer.c |  128 
>> ----------------------------------------
>>  1 files changed, 0 insertions(+), 128 deletions(-)
>>
>> diff --git a/cpu/arm_cortexa8/omap3/timer.c 
>> b/cpu/arm_cortexa8/omap3/timer.c
>> index e99b149..a73916c 100644
>> --- a/cpu/arm_cortexa8/omap3/timer.c
>> +++ b/cpu/arm_cortexa8/omap3/timer.c
> 
> There is no file "cpu/arm_cortexa8/omap3/timer.c". It seems to me that 
> you base this patch on an other one without mentioning it.
> 
> But this is just a minor issue in contrast to the above :(
> 
> Dirk
> 
>> @@ -34,134 +34,6 @@
>>  
>>  #include <common.h>
>>  #include <asm/io.h>
>> -#include <asm/proc-armv/ptrace.h>
>> -
>> -#ifdef CONFIG_USE_IRQ
>> -/* enable IRQ interrupts */
>> -void enable_interrupts(void)
>> -{
>> -    unsigned long temp;
>> -    __asm__ __volatile__("mrs %0, cpsr\n"
>> -                 "bic %0, %0, #0x80\n" "msr cpsr_c, %0":"=r"(temp)
>> -                 ::"memory");
>> -}
>> -
>> -/*
>> - * disable IRQ/FIQ interrupts
>> - * returns true if interrupts had been enabled before we disabled them
>> - */
>> -int disable_interrupts(void)
>> -{
>> -    unsigned long old, temp;
>> -    __asm__ __volatile__("mrs %0, cpsr\n"
>> -                 "orr %1, %0, #0xc0\n"
>> -                 "msr cpsr_c, %1":"=r"(old), "=r"(temp)
>> -                 ::"memory");
>> -    return (old & 0x80) == 0;
>> -}
>> -#else
>> -void enable_interrupts(void)
>> -{
>> -    return;
>> -}
>> -int disable_interrupts(void)
>> -{
>> -    return 0;
>> -}
>> -#endif
>> -
>> -void bad_mode(void)
>> -{
>> -    panic("Resetting CPU ...\n");
>> -    reset_cpu(0);
>> -}
>> -
>> -void show_regs(struct pt_regs *regs)
>> -{
>> -    unsigned long flags;
>> -    const char *processor_modes[] = {
>> -        "USER_26", "FIQ_26", "IRQ_26", "SVC_26",
>> -        "UK4_26", "UK5_26", "UK6_26", "UK7_26",
>> -        "UK8_26", "UK9_26", "UK10_26", "UK11_26",
>> -        "UK12_26", "UK13_26", "UK14_26", "UK15_26",
>> -        "USER_32", "FIQ_32", "IRQ_32", "SVC_32",
>> -        "UK4_32", "UK5_32", "UK6_32", "ABT_32",
>> -        "UK8_32", "UK9_32", "UK10_32", "UND_32",
>> -        "UK12_32", "UK13_32", "UK14_32", "SYS_32",
>> -    };
>> -
>> -    flags = condition_codes(regs);
>> -
>> -    printf("pc : [<%08lx>]    lr : [<%08lx>]\n"
>> -        "sp : %08lx  ip : %08lx  fp : %08lx\n",
>> -        instruction_pointer(regs),
>> -        regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
>> -    printf("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
>> -        regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
>> -    printf("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
>> -        regs->ARM_r7, regs->ARM_r6, regs->ARM_r5, regs->ARM_r4);
>> -    printf("r3 : %08lx  r2 : %08lx  r1 : %08lx  r0 : %08lx\n",
>> -        regs->ARM_r3, regs->ARM_r2, regs->ARM_r1, regs->ARM_r0);
>> -    printf("Flags: %c%c%c%c",
>> -        flags & CC_N_BIT ? 'N' : 'n',
>> -        flags & CC_Z_BIT ? 'Z' : 'z',
>> -        flags & CC_C_BIT ? 'C' : 'c', flags & CC_V_BIT ? 'V' : 'v');
>> -    printf("  IRQs %s  FIQs %s  Mode %s%s\n",
>> -        interrupts_enabled(regs) ? "on" : "off",
>> -        fast_interrupts_enabled(regs) ? "on" : "off",
>> -        processor_modes[processor_mode(regs)],
>> -        thumb_mode(regs) ? " (T)" : "");
>> -}
>> -
>> -void do_undefined_instruction(struct pt_regs *pt_regs)
>> -{
>> -    printf("undefined instruction\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>> -void do_software_interrupt(struct pt_regs *pt_regs)
>> -{
>> -    printf("software interrupt\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>> -void do_prefetch_abort(struct pt_regs *pt_regs)
>> -{
>> -    printf("prefetch abort\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>> -void do_data_abort(struct pt_regs *pt_regs)
>> -{
>> -    printf("data abort\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>> -void do_not_used(struct pt_regs *pt_regs)
>> -{
>> -    printf("not used\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>> -void do_fiq(struct pt_regs *pt_regs)
>> -{
>> -    printf("fast interrupt request\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>> -void do_irq(struct pt_regs *pt_regs)
>> -{
>> -    printf("interrupt request\n");
>> -    show_regs(pt_regs);
>> -    bad_mode();
>> -}
>> -
>>  
>>  static ulong timestamp;
>>  static ulong lastinc;
> 
>