| Message ID | 20240730091322.5741-2-linux.amoon@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v1,1/2] ARM: dts: samsung: Add cache information to the Exynos4412 SoCS | expand |
On 30.07.2024 11:13, Anand Moon wrote: > As per Exynos 5422 user manual add missing cache information to > the Exynos542x SoC. > > - Each Cortex-A7 core has 32 KB of instruction cache and > 32 KB of L1 data cache available. > - Each Cortex-A15 core has 32 KB of L1 instruction cache and > 32 KB of L1 data cache available. > - The little (A7) cluster has 512 KB of unified L2 cache available. > - The big (A15) cluster has 2 MB of unified L2 cache available. > > Features: > - Exynos 5422 support cache coherency interconnect (CCI) bus with > L2 cache snooping capability. This hardware automatic L2 cache > snooping removes the efforts of synchronizing the contents of the > two L2 caches in core switching event. > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> The provided values are not correct. Please refer to commit 5f41f9198f29 ("ARM: 8864/1: Add workaround for I-Cache line size mismatch between CPU cores"), which adds workaround for different l1 icache line size between big and little CPUs. This workaround gets enabled on all Exynos542x/5800 boards. > --- > .../arm/boot/dts/samsung/exynos5422-cpus.dtsi | 74 +++++++++++++++++++ > 1 file changed, 74 insertions(+) > > diff --git a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi > index 412a0bb4b988..9b9b2bdfb522 100644 > --- a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi > +++ b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi > @@ -59,6 +59,13 @@ cpu0: cpu@100 { > reg = <0x100>; > clocks = <&clock CLK_KFC_CLK>; > clock-frequency = <1000000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a7>; > cci-control-port = <&cci_control0>; > operating-points-v2 = <&cluster_a7_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -72,6 +79,13 @@ cpu1: cpu@101 { > reg = <0x101>; > clocks = <&clock CLK_KFC_CLK>; > clock-frequency = <1000000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a7>; > cci-control-port = <&cci_control0>; > operating-points-v2 = <&cluster_a7_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -85,6 +99,13 @@ cpu2: cpu@102 { > reg = <0x102>; > clocks = <&clock CLK_KFC_CLK>; > clock-frequency = <1000000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a7>; > cci-control-port = <&cci_control0>; > operating-points-v2 = <&cluster_a7_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -98,6 +119,13 @@ cpu3: cpu@103 { > reg = <0x103>; > clocks = <&clock CLK_KFC_CLK>; > clock-frequency = <1000000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a7>; > cci-control-port = <&cci_control0>; > operating-points-v2 = <&cluster_a7_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -111,6 +139,13 @@ cpu4: cpu@0 { > reg = <0x0>; > clocks = <&clock CLK_ARM_CLK>; > clock-frequency = <1800000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a15>; > cci-control-port = <&cci_control1>; > operating-points-v2 = <&cluster_a15_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -124,6 +159,13 @@ cpu5: cpu@1 { > reg = <0x1>; > clocks = <&clock CLK_ARM_CLK>; > clock-frequency = <1800000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a15>; > cci-control-port = <&cci_control1>; > operating-points-v2 = <&cluster_a15_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -137,6 +179,13 @@ cpu6: cpu@2 { > reg = <0x2>; > clocks = <&clock CLK_ARM_CLK>; > clock-frequency = <1800000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a15>; > cci-control-port = <&cci_control1>; > operating-points-v2 = <&cluster_a15_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > @@ -150,12 +199,37 @@ cpu7: cpu@3 { > reg = <0x3>; > clocks = <&clock CLK_ARM_CLK>; > clock-frequency = <1800000000>; > + d-cache-line-size = <32>; > + d-cache-size = <0x8000>; > + d-cache-sets = <32>; > + i-cache-line-size = <32>; > + i-cache-size = <0x8000>; > + i-cache-sets = <32>; > + next-level-cache = <&L2_a15>; > cci-control-port = <&cci_control1>; > operating-points-v2 = <&cluster_a15_opp_table>; > #cooling-cells = <2>; /* min followed by max */ > capacity-dmips-mhz = <1024>; > dynamic-power-coefficient = <310>; > }; > + > + L2_a7: l2-cache-cluster0 { > + compatible = "cache"; > + cache-level = <2>; > + cache-unified; > + cache-size = <0x80000>; /* L2. 512 KB */ > + cache-line-size = <64>; > + cache-sets = <512>; > + }; > + > + L2_a15: l2-cache-cluster1 { > + compatible = "cache"; > + cache-level = <2>; > + cache-unified; > + cache-size = <0x200000>; /* L2, 2M */ > + cache-line-size = <64>; > + cache-sets = <512>; > + }; > }; > }; > Best regards
Hi Marek, On Tue, 30 Jul 2024 at 17:14, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > > > On 30.07.2024 11:13, Anand Moon wrote: > > As per Exynos 5422 user manual add missing cache information to > > the Exynos542x SoC. > > > > - Each Cortex-A7 core has 32 KB of instruction cache and > > 32 KB of L1 data cache available. > > - Each Cortex-A15 core has 32 KB of L1 instruction cache and > > 32 KB of L1 data cache available. > > - The little (A7) cluster has 512 KB of unified L2 cache available. > > - The big (A15) cluster has 2 MB of unified L2 cache available. > > > > Features: > > - Exynos 5422 support cache coherency interconnect (CCI) bus with > > L2 cache snooping capability. This hardware automatic L2 cache > > snooping removes the efforts of synchronizing the contents of the > > two L2 caches in core switching event. > > > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > > > The provided values are not correct. Please refer to commit 5f41f9198f29 > ("ARM: 8864/1: Add workaround for I-Cache line size mismatch between CPU > cores"), which adds workaround for different l1 icache line size between > big and little CPUs. This workaround gets enabled on all Exynos542x/5800 > boards. > Ok, I have just referred to the Exynos 5422 user manual for this patch, This patch is just updating the cache size for CPU for big.litle architecture.. Thanks -Anand > > > --- > > .../arm/boot/dts/samsung/exynos5422-cpus.dtsi | 74 +++++++++++++++++++ > > 1 file changed, 74 insertions(+) > > > > diff --git a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi > > index 412a0bb4b988..9b9b2bdfb522 100644 > > --- a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi > > +++ b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi > > @@ -59,6 +59,13 @@ cpu0: cpu@100 { > > reg = <0x100>; > > clocks = <&clock CLK_KFC_CLK>; > > clock-frequency = <1000000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a7>; > > cci-control-port = <&cci_control0>; > > operating-points-v2 = <&cluster_a7_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -72,6 +79,13 @@ cpu1: cpu@101 { > > reg = <0x101>; > > clocks = <&clock CLK_KFC_CLK>; > > clock-frequency = <1000000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a7>; > > cci-control-port = <&cci_control0>; > > operating-points-v2 = <&cluster_a7_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -85,6 +99,13 @@ cpu2: cpu@102 { > > reg = <0x102>; > > clocks = <&clock CLK_KFC_CLK>; > > clock-frequency = <1000000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a7>; > > cci-control-port = <&cci_control0>; > > operating-points-v2 = <&cluster_a7_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -98,6 +119,13 @@ cpu3: cpu@103 { > > reg = <0x103>; > > clocks = <&clock CLK_KFC_CLK>; > > clock-frequency = <1000000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a7>; > > cci-control-port = <&cci_control0>; > > operating-points-v2 = <&cluster_a7_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -111,6 +139,13 @@ cpu4: cpu@0 { > > reg = <0x0>; > > clocks = <&clock CLK_ARM_CLK>; > > clock-frequency = <1800000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a15>; > > cci-control-port = <&cci_control1>; > > operating-points-v2 = <&cluster_a15_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -124,6 +159,13 @@ cpu5: cpu@1 { > > reg = <0x1>; > > clocks = <&clock CLK_ARM_CLK>; > > clock-frequency = <1800000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a15>; > > cci-control-port = <&cci_control1>; > > operating-points-v2 = <&cluster_a15_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -137,6 +179,13 @@ cpu6: cpu@2 { > > reg = <0x2>; > > clocks = <&clock CLK_ARM_CLK>; > > clock-frequency = <1800000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a15>; > > cci-control-port = <&cci_control1>; > > operating-points-v2 = <&cluster_a15_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > @@ -150,12 +199,37 @@ cpu7: cpu@3 { > > reg = <0x3>; > > clocks = <&clock CLK_ARM_CLK>; > > clock-frequency = <1800000000>; > > + d-cache-line-size = <32>; > > + d-cache-size = <0x8000>; > > + d-cache-sets = <32>; > > + i-cache-line-size = <32>; > > + i-cache-size = <0x8000>; > > + i-cache-sets = <32>; > > + next-level-cache = <&L2_a15>; > > cci-control-port = <&cci_control1>; > > operating-points-v2 = <&cluster_a15_opp_table>; > > #cooling-cells = <2>; /* min followed by max */ > > capacity-dmips-mhz = <1024>; > > dynamic-power-coefficient = <310>; > > }; > > + > > + L2_a7: l2-cache-cluster0 { > > + compatible = "cache"; > > + cache-level = <2>; > > + cache-unified; > > + cache-size = <0x80000>; /* L2. 512 KB */ > > + cache-line-size = <64>; > > + cache-sets = <512>; > > + }; > > + > > + L2_a15: l2-cache-cluster1 { > > + compatible = "cache"; > > + cache-level = <2>; > > + cache-unified; > > + cache-size = <0x200000>; /* L2, 2M */ > > + cache-line-size = <64>; > > + cache-sets = <512>; > > + }; > > }; > > }; > > > > Best regards > -- > Marek Szyprowski, PhD > Samsung R&D Institute Poland >
On 30/07/2024 14:06, Anand Moon wrote: > Hi Marek, > > On Tue, 30 Jul 2024 at 17:14, Marek Szyprowski <m.szyprowski@samsung.com> wrote: >> >> >> On 30.07.2024 11:13, Anand Moon wrote: >>> As per Exynos 5422 user manual add missing cache information to >>> the Exynos542x SoC. >>> >>> - Each Cortex-A7 core has 32 KB of instruction cache and >>> 32 KB of L1 data cache available. >>> - Each Cortex-A15 core has 32 KB of L1 instruction cache and >>> 32 KB of L1 data cache available. >>> - The little (A7) cluster has 512 KB of unified L2 cache available. >>> - The big (A15) cluster has 2 MB of unified L2 cache available. >>> >>> Features: >>> - Exynos 5422 support cache coherency interconnect (CCI) bus with >>> L2 cache snooping capability. This hardware automatic L2 cache >>> snooping removes the efforts of synchronizing the contents of the >>> two L2 caches in core switching event. >>> >>> Signed-off-by: Anand Moon <linux.amoon@gmail.com> >> >> >> The provided values are not correct. Please refer to commit 5f41f9198f29 >> ("ARM: 8864/1: Add workaround for I-Cache line size mismatch between CPU >> cores"), which adds workaround for different l1 icache line size between >> big and little CPUs. This workaround gets enabled on all Exynos542x/5800 >> boards. >> > Ok, I have just referred to the Exynos 5422 user manual for this patch, > This patch is just updating the cache size for CPU for big.litle architecture.. > Let me get it right. Marek's comment was that you used wrong values. Marek also provided rationale for this. Now your reply is that you update cache size? Sorry, I fail how you address Marek's comment. Do not repeat what the patch is doing. We all can see it. Instead respond to the comment with some sort of arguments. Best regards, Krzysztof
Hi Krzysztof, On Tue, 30 Jul 2024 at 17:57, Krzysztof Kozlowski <krzk@kernel.org> wrote: > > On 30/07/2024 14:06, Anand Moon wrote: > > Hi Marek, > > > > On Tue, 30 Jul 2024 at 17:14, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > >> > >> > >> On 30.07.2024 11:13, Anand Moon wrote: > >>> As per Exynos 5422 user manual add missing cache information to > >>> the Exynos542x SoC. > >>> > >>> - Each Cortex-A7 core has 32 KB of instruction cache and > >>> 32 KB of L1 data cache available. > >>> - Each Cortex-A15 core has 32 KB of L1 instruction cache and > >>> 32 KB of L1 data cache available. > >>> - The little (A7) cluster has 512 KB of unified L2 cache available. > >>> - The big (A15) cluster has 2 MB of unified L2 cache available. > >>> > >>> Features: > >>> - Exynos 5422 support cache coherency interconnect (CCI) bus with > >>> L2 cache snooping capability. This hardware automatic L2 cache > >>> snooping removes the efforts of synchronizing the contents of the > >>> two L2 caches in core switching event. > >>> > >>> Signed-off-by: Anand Moon <linux.amoon@gmail.com> > >> > >> > >> The provided values are not correct. Please refer to commit 5f41f9198f29 > >> ("ARM: 8864/1: Add workaround for I-Cache line size mismatch between CPU > >> cores"), which adds workaround for different l1 icache line size between > >> big and little CPUs. This workaround gets enabled on all Exynos542x/5800 > >> boards. > >> > > Ok, I have just referred to the Exynos 5422 user manual for this patch, > > This patch is just updating the cache size for CPU for big.litle architecture.. > > > > Let me get it right. Marek's comment was that you used wrong values. > Marek also provided rationale for this. Now your reply is that you > update cache size? Sorry, I fail how you address Marek's comment. > > Do not repeat what the patch is doing. We all can see it. Instead > respond to the comment with some sort of arguments. > Ok, If I am not wrong icache_size is hard-coded in the above commit. +#ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND +.globl icache_size + .data + .align 2 +icache_size: + .long 64 + .text +#endif In the check_cpu_icache_size function, we read the control reg and recalculate the icache_size. if there mismatch we re-apply the Icache_size, So dts passed values do not apply over here, > Best regards, > Krzysztof > Thanks -Anand
On 30/07/2024 15:20, Anand Moon wrote: > Hi Krzysztof, > > On Tue, 30 Jul 2024 at 17:57, Krzysztof Kozlowski <krzk@kernel.org> wrote: >> >> On 30/07/2024 14:06, Anand Moon wrote: >>> Hi Marek, >>> >>> On Tue, 30 Jul 2024 at 17:14, Marek Szyprowski <m.szyprowski@samsung.com> wrote: >>>> >>>> >>>> On 30.07.2024 11:13, Anand Moon wrote: >>>>> As per Exynos 5422 user manual add missing cache information to >>>>> the Exynos542x SoC. >>>>> >>>>> - Each Cortex-A7 core has 32 KB of instruction cache and >>>>> 32 KB of L1 data cache available. >>>>> - Each Cortex-A15 core has 32 KB of L1 instruction cache and >>>>> 32 KB of L1 data cache available. >>>>> - The little (A7) cluster has 512 KB of unified L2 cache available. >>>>> - The big (A15) cluster has 2 MB of unified L2 cache available. >>>>> >>>>> Features: >>>>> - Exynos 5422 support cache coherency interconnect (CCI) bus with >>>>> L2 cache snooping capability. This hardware automatic L2 cache >>>>> snooping removes the efforts of synchronizing the contents of the >>>>> two L2 caches in core switching event. >>>>> >>>>> Signed-off-by: Anand Moon <linux.amoon@gmail.com> >>>> >>>> >>>> The provided values are not correct. Please refer to commit 5f41f9198f29 >>>> ("ARM: 8864/1: Add workaround for I-Cache line size mismatch between CPU >>>> cores"), which adds workaround for different l1 icache line size between >>>> big and little CPUs. This workaround gets enabled on all Exynos542x/5800 >>>> boards. >>>> >>> Ok, I have just referred to the Exynos 5422 user manual for this patch, >>> This patch is just updating the cache size for CPU for big.litle architecture.. >>> >> >> Let me get it right. Marek's comment was that you used wrong values. >> Marek also provided rationale for this. Now your reply is that you >> update cache size? Sorry, I fail how you address Marek's comment. >> >> Do not repeat what the patch is doing. We all can see it. Instead >> respond to the comment with some sort of arguments. >> > > Ok, If I am not wrong icache_size is hard-coded in the above commit. > > +#ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND > +.globl icache_size > + .data > + .align 2 > +icache_size: > + .long 64 > + .text > +#endif > > In the check_cpu_icache_size function, we read the control reg > and recalculate the icache_size. > if there mismatch we re-apply the Icache_size, > > So dts passed values do not apply over here, So you provide incorrect values in terms of them being ignored? Then do not provide at all. Best regards, Krzysztof
Hi Krzysztof, On Tue, 30 Jul 2024 at 18:53, Krzysztof Kozlowski <krzk@kernel.org> wrote: > > On 30/07/2024 15:20, Anand Moon wrote: > > Hi Krzysztof, > > > > On Tue, 30 Jul 2024 at 17:57, Krzysztof Kozlowski <krzk@kernel.org> wrote: > >> > >> On 30/07/2024 14:06, Anand Moon wrote: > >>> Hi Marek, > >>> > >>> On Tue, 30 Jul 2024 at 17:14, Marek Szyprowski <m.szyprowski@samsung.com> wrote: > >>>> > >>>> > >>>> On 30.07.2024 11:13, Anand Moon wrote: > >>>>> As per the Exynos 5422 user manual add missing cache information to > >>>>> the Exynos542x SoC. > >>>>> > >>>>> - Each Cortex-A7 core has 32 KB of instruction cache and > >>>>> 32 KB of L1 data cache available. > >>>>> - Each Cortex-A15 core has 32 KB of L1 instruction cache and > >>>>> 32 KB of L1 data cache available. > >>>>> - The little (A7) cluster has 512 KB of unified L2 cache available. > >>>>> - The big (A15) cluster has 2 MB of unified L2 cache available. > >>>>> > >>>>> Features: > >>>>> - Exynos 5422 support cache coherency interconnect (CCI) bus with > >>>>> L2 cache snooping capability. This hardware automatic L2 cache > >>>>> snooping removes the efforts of synchronizing the contents of the > >>>>> two L2 caches in core switching event. > >>>>> > >>>>> Signed-off-by: Anand Moon <linux.amoon@gmail.com> > >>>> > >>>> > >>>> The provided values are not correct. Please refer to commit 5f41f9198f29 > >>>> ("ARM: 8864/1: Add workaround for I-Cache line size mismatch between CPU > >>>> cores"), which adds workaround for different l1 icache line size between > >>>> big and little CPUs. This workaround gets enabled on all Exynos542x/5800 > >>>> boards. > >>>> > >>> Ok, I have just referred to the Exynos 5422 user manual for this patch, > >>> This patch is just updating the cache size for CPU for big.litle architecture.. > >>> > >> > >> Let me get it right. Marek's comment was that you used wrong values. > >> Marek also provided rationale for this. Now your reply is that you > >> update cache size? Sorry, I fail how you address Marek's comment. > >> > >> Do not repeat what the patch is doing. We all can see it. Instead > >> respond to the comment with some sort of arguments. > >> > > > > Ok, If I am not wrong icache_size is hard-coded in the above commit. > > > > +#ifdef CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND > > +.globl icache_size > > + .data > > + .align 2 > > +icache_size: > > + .long 64 > > + .text > > +#endif > > > > In the check_cpu_icache_size function, we read the control reg > > and recalculate the icache_size. > > if there mismatch we re-apply the Icache_size, > > > > So dts passed values do not apply over here, > > So you provide incorrect values in terms of them being ignored? Then do > not provide at all. > I will drop the icache and dcache values and just pass the L2_a7 and L2_a15, value Is this ok for you? Earlier, I have tried to verify this information in /sys and /proc to verify the changes as ARM does not populate this information. > Best regards, > Krzysztof > Thanks -Anand
diff --git a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi index 412a0bb4b988..9b9b2bdfb522 100644 --- a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi +++ b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi @@ -59,6 +59,13 @@ cpu0: cpu@100 { reg = <0x100>; clocks = <&clock CLK_KFC_CLK>; clock-frequency = <1000000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a7>; cci-control-port = <&cci_control0>; operating-points-v2 = <&cluster_a7_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -72,6 +79,13 @@ cpu1: cpu@101 { reg = <0x101>; clocks = <&clock CLK_KFC_CLK>; clock-frequency = <1000000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a7>; cci-control-port = <&cci_control0>; operating-points-v2 = <&cluster_a7_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -85,6 +99,13 @@ cpu2: cpu@102 { reg = <0x102>; clocks = <&clock CLK_KFC_CLK>; clock-frequency = <1000000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a7>; cci-control-port = <&cci_control0>; operating-points-v2 = <&cluster_a7_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -98,6 +119,13 @@ cpu3: cpu@103 { reg = <0x103>; clocks = <&clock CLK_KFC_CLK>; clock-frequency = <1000000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a7>; cci-control-port = <&cci_control0>; operating-points-v2 = <&cluster_a7_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -111,6 +139,13 @@ cpu4: cpu@0 { reg = <0x0>; clocks = <&clock CLK_ARM_CLK>; clock-frequency = <1800000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a15>; cci-control-port = <&cci_control1>; operating-points-v2 = <&cluster_a15_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -124,6 +159,13 @@ cpu5: cpu@1 { reg = <0x1>; clocks = <&clock CLK_ARM_CLK>; clock-frequency = <1800000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a15>; cci-control-port = <&cci_control1>; operating-points-v2 = <&cluster_a15_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -137,6 +179,13 @@ cpu6: cpu@2 { reg = <0x2>; clocks = <&clock CLK_ARM_CLK>; clock-frequency = <1800000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a15>; cci-control-port = <&cci_control1>; operating-points-v2 = <&cluster_a15_opp_table>; #cooling-cells = <2>; /* min followed by max */ @@ -150,12 +199,37 @@ cpu7: cpu@3 { reg = <0x3>; clocks = <&clock CLK_ARM_CLK>; clock-frequency = <1800000000>; + d-cache-line-size = <32>; + d-cache-size = <0x8000>; + d-cache-sets = <32>; + i-cache-line-size = <32>; + i-cache-size = <0x8000>; + i-cache-sets = <32>; + next-level-cache = <&L2_a15>; cci-control-port = <&cci_control1>; operating-points-v2 = <&cluster_a15_opp_table>; #cooling-cells = <2>; /* min followed by max */ capacity-dmips-mhz = <1024>; dynamic-power-coefficient = <310>; }; + + L2_a7: l2-cache-cluster0 { + compatible = "cache"; + cache-level = <2>; + cache-unified; + cache-size = <0x80000>; /* L2. 512 KB */ + cache-line-size = <64>; + cache-sets = <512>; + }; + + L2_a15: l2-cache-cluster1 { + compatible = "cache"; + cache-level = <2>; + cache-unified; + cache-size = <0x200000>; /* L2, 2M */ + cache-line-size = <64>; + cache-sets = <512>; + }; }; };
As per Exynos 5422 user manual add missing cache information to the Exynos542x SoC. - Each Cortex-A7 core has 32 KB of instruction cache and 32 KB of L1 data cache available. - Each Cortex-A15 core has 32 KB of L1 instruction cache and 32 KB of L1 data cache available. - The little (A7) cluster has 512 KB of unified L2 cache available. - The big (A15) cluster has 2 MB of unified L2 cache available. Features: - Exynos 5422 support cache coherency interconnect (CCI) bus with L2 cache snooping capability. This hardware automatic L2 cache snooping removes the efforts of synchronizing the contents of the two L2 caches in core switching event. Signed-off-by: Anand Moon <linux.amoon@gmail.com> --- .../arm/boot/dts/samsung/exynos5422-cpus.dtsi | 74 +++++++++++++++++++ 1 file changed, 74 insertions(+)