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mips: cm: Convert __mips_cm_phys_base() to weak function

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Based on the design pattern utilized in the CM GCR base address getter
implementation, the platform-specific code is capable to re-define the
getter and re-use the weakly defined initial version. But since the
pattern hasn't been used for over 10 years and another similar case (CM
L2-sync only base address getter) has just been fixed, let's unify the
interface and convert it to a more traditional single weakly defined
method: mips_cm_phys_base() (see the link below for the discussion around
this).

Link: https://lore.kernel.org/linux-mips/20240215171740.14550-3-fancer.lancer@gmail.com
Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Serge Semin 2024-02-26 13:54:22 +03:00 committed by Thomas Bogendoerfer
parent 8bc8db2ab2
commit 7329322200
2 changed files with 4 additions and 8 deletions
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7
arch/mips/include/asm/mips-cm.h
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@ -22,16 +22,15 @@ extern void __iomem *mips_gcr_base;
extern void __iomem *mips_cm_l2sync_base; extern void __iomem *mips_cm_l2sync_base;
/** /**
* __mips_cm_phys_base - retrieve the physical base address of the CM * mips_cm_phys_base - retrieve the physical base address of the CM
* *
* This function returns the physical base address of the Coherence Manager * This function returns the physical base address of the Coherence Manager
* global control block, or 0 if no Coherence Manager is present. It provides * global control block, or 0 if no Coherence Manager is present. It provides
* a default implementation which reads the CMGCRBase register where available, * a default implementation which reads the CMGCRBase register where available,
* and may be overridden by platforms which determine this address in a * and may be overridden by platforms which determine this address in a
* different way by defining a function with the same prototype except for the * different way by defining a function with the same prototype.
* name mips_cm_phys_base (without underscores).
*/ */
extern phys_addr_t __mips_cm_phys_base(void); extern phys_addr_t mips_cm_phys_base(void);
/** /**
* mips_cm_l2sync_phys_base - retrieve the physical base address of the CM * mips_cm_l2sync_phys_base - retrieve the physical base address of the CM

5
arch/mips/kernel/mips-cm.c
View File

@ -179,7 +179,7 @@ static char *cm3_causes[32] = {
static DEFINE_PER_CPU_ALIGNED(spinlock_t, cm_core_lock); static DEFINE_PER_CPU_ALIGNED(spinlock_t, cm_core_lock);
static DEFINE_PER_CPU_ALIGNED(unsigned long, cm_core_lock_flags); static DEFINE_PER_CPU_ALIGNED(unsigned long, cm_core_lock_flags);
phys_addr_t __mips_cm_phys_base(void) phys_addr_t __weak mips_cm_phys_base(void)
{ {
unsigned long cmgcr; unsigned long cmgcr;
@ -198,9 +198,6 @@ phys_addr_t __mips_cm_phys_base(void)
return (cmgcr & MIPS_CMGCRF_BASE) << (36 - 32); return (cmgcr & MIPS_CMGCRF_BASE) << (36 - 32);
} }
phys_addr_t mips_cm_phys_base(void)
__attribute__((weak, alias("__mips_cm_phys_base")));
phys_addr_t __weak mips_cm_l2sync_phys_base(void) phys_addr_t __weak mips_cm_l2sync_phys_base(void)
{ {
u32 base_reg; u32 base_reg;