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sh: boot word / mode pin support V2

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Add mode pin support for the SuperH architecture V2.

With this patch applied the board code can add their
own function to export the cpu mode pin configuration.
In most cases this will be a constant bitmap, but
boards that allow reading this from a register can
instead read out the pin state from hardware.

The code warns if a pin is tested but no board specific
mode pin function has been provided.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2009-05-28 11:51:51 +00:00 committed by Paul Mundt
parent 5582b0648d
commit eb9b9b56ee
4 changed files with 18 additions and 0 deletions
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1
arch/sh/include/asm/machvec.h
View File

@ -48,6 +48,7 @@ struct sh_machine_vector {
void (*mv_ioport_unmap)(void __iomem *);
int (*mv_clk_init)(void);
int (*mv_mode_pins)(void);
};
extern struct sh_machine_vector sh_mv;

4
arch/sh/include/asm/processor.h
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@ -94,6 +94,10 @@ extern struct pt_regs fake_swapper_regs;
const char *get_cpu_subtype(struct sh_cpuinfo *c);
extern const struct seq_operations cpuinfo_op;
/* processor boot mode configuration */
int generic_mode_pins(void);
int test_mode_pin(int pin);
#ifdef CONFIG_VSYSCALL
int vsyscall_init(void);
#else

1
arch/sh/kernel/machvec.c
View File

@ -129,6 +129,7 @@ void __init sh_mv_setup(void)
mv_set(ioport_map);
mv_set(ioport_unmap);
mv_set(irq_demux);
mv_set(mode_pins);
if (!sh_mv.mv_nr_irqs)
sh_mv.mv_nr_irqs = NR_IRQS;

12
arch/sh/kernel/setup.c
View File

@ -420,6 +420,18 @@ void __init setup_arch(char **cmdline_p)
#endif
}
/* processor boot mode configuration */
int generic_mode_pins(void)
{
pr_warning("generic_mode_pins(): missing mode pin configuration\n");
return 0;
}
int test_mode_pin(int pin)
{
return sh_mv.mv_mode_pins() & (1 << pin);
}
static const char *cpu_name[] = {
[CPU_SH7201] = "SH7201",
[CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263",