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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-01-09 02:31:48 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-02-06 11:46:04 +0300 |
| commit | 65e01f386fcddb3460be78fc886856889f80ecc7 (patch) | |
| tree | 0bea2fc49e3bee2a3d7e16f0bf1d244abec0f9b2 | |
| parent | e2827fe5c1566f66a922dd7493cbe4522c50580a (diff) | |
| download | linux-65e01f386fcddb3460be78fc886856889f80ecc7.tar.xz | |
powerpc/64: Add L2 and L3 cache shape info
Retrieved from device-tree when available
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/cache.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 26 |
2 files changed, 23 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/cache.h b/arch/powerpc/include/asm/cache.h index 823750fa6e66..d7cf60f87604 100644 --- a/arch/powerpc/include/asm/cache.h +++ b/arch/powerpc/include/asm/cache.h @@ -43,6 +43,8 @@ struct ppc_cache_info { struct ppc64_caches { struct ppc_cache_info l1d; struct ppc_cache_info l1i; + struct ppc_cache_info l2; + struct ppc_cache_info l3; }; extern struct ppc64_caches ppc64_caches; diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index b87dcb2968d9..db18f7b68a1d 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -472,22 +472,38 @@ static bool __init parse_cache_info(struct device_node *np, void __init initialize_cache_info(void) { - struct device_node *np; + struct device_node *cpu, *l2, *l3 = NULL; DBG(" -> initialize_cache_info()\n"); - np = of_find_node_by_type(NULL, "cpu"); + cpu = of_find_node_by_type(NULL, "cpu"); /* * We're assuming *all* of the CPUs have the same * d-cache and i-cache sizes... -Peter */ - if (np) { - if (!parse_cache_info(np, false, &ppc64_caches.l1d)) + if (cpu) { + if (!parse_cache_info(cpu, false, &ppc64_caches.l1d)) DBG("Argh, can't find dcache properties !\n"); - if (!parse_cache_info(np, true, &ppc64_caches.l1i)) + if (!parse_cache_info(cpu, true, &ppc64_caches.l1i)) DBG("Argh, can't find icache properties !\n"); + + /* + * Try to find the L2 and L3 if any. Assume they are + * unified and use the D-side properties. + */ + l2 = of_find_next_cache_node(cpu); + of_node_put(cpu); + if (l2) { + parse_cache_info(l2, false, &ppc64_caches.l2); + l3 = of_find_next_cache_node(l2); + of_node_put(l2); + } + if (l3) { + parse_cache_info(l3, false, &ppc64_caches.l3); + of_node_put(l3); + } } /* For use by binfmt_elf */ |