From e8222502ee6157e2713da9e0792c21f4ad458d50 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Tue, 28 Mar 2006 23:15:54 +1100 Subject: [PATCH] powerpc: Kill _machine and hard-coded platform numbers This removes statically assigned platform numbers and reworks the powerpc platform probe code to use a better mechanism. With this, board support files can simply declare a new machine type with a macro, and implement a probe() function that uses the flattened device-tree to detect if they apply for a given machine. We now have a machine_is() macro that replaces the comparisons of _machine with the various PLATFORM_* constants. This commit also changes various drivers to use the new macro instead of looking at _machine. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- include/asm-powerpc/machdep.h | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) (limited to 'include/asm-powerpc/machdep.h') diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h index 758e47fe8c1..5ed84768075 100644 --- a/include/asm-powerpc/machdep.h +++ b/include/asm-powerpc/machdep.h @@ -47,6 +47,7 @@ struct smp_ops_t { #endif struct machdep_calls { + char *name; #ifdef CONFIG_PPC64 void (*hpte_invalidate)(unsigned long slot, unsigned long va, @@ -85,9 +86,9 @@ struct machdep_calls { void (*iommu_dev_setup)(struct pci_dev *dev); void (*iommu_bus_setup)(struct pci_bus *bus); void (*irq_bus_setup)(struct pci_bus *bus); -#endif +#endif /* CONFIG_PPC64 */ - int (*probe)(int platform); + int (*probe)(void); void (*setup_arch)(void); void (*init_early)(void); /* Optional, may be NULL. */ @@ -207,8 +208,6 @@ struct machdep_calls { /* Called at then very end of pcibios_init() */ void (*pcibios_after_init)(void); - /* this is for modules, since _machine can be a define -- Cort */ - int ppc_machine; #endif /* CONFIG_PPC32 */ /* Called to shutdown machine specific hardware not already controlled @@ -244,7 +243,26 @@ struct machdep_calls { extern void power4_idle(void); extern void ppc6xx_idle(void); +/* + * ppc_md contains a copy of the machine description structure for the + * current platform. machine_id contains the initial address where the + * description was found during boot. + */ extern struct machdep_calls ppc_md; +extern struct machdep_calls *machine_id; + +#define __machine_desc __attribute__ ((__section__ (".machine.desc"))) + +#define define_machine(name) struct machdep_calls mach_##name __machine_desc = +#define machine_is(name) \ + ({ \ + extern struct machdep_calls mach_##name \ + __attribute__((weak)); \ + machine_id == &mach_##name; \ + }) + +extern void probe_machine(void); + extern char cmd_line[COMMAND_LINE_SIZE]; #ifdef CONFIG_PPC_PMAC -- cgit v1.2.3