From 7c9644a7b5e557f05b818296287cdebdd38f1097 Mon Sep 17 00:00:00 2001 From: Christian Marangi Date: Tue, 25 Jun 2024 11:19:41 +0200 Subject: [PATCH] bmips: backport upstreamed RAC patches MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Replace downstream bmips RAC fixes with upstream patches. Signed-off-by: Christian Marangi [backport upstream patches] Signed-off-by: Álvaro Fernández Rojas --- target/linux/bmips/dts/bcm6358.dtsi | 1 + target/linux/bmips/dts/bcm6368.dtsi | 1 + ...M6358-make-sure-CBR-is-correctly-set.patch | 35 ++++ ...s-rework-and-cache-CBR-addr-handling.patch | 171 ++++++++++++++++++ ...-setup-make-CBR-address-configurable.patch | 111 ++++++++++++ ...1-mips-bmips-enable-RAC-on-BMIPS4350.patch | 57 ++++++ ...s-automatically-detect-CPU-frequency.patch | 8 +- ...-bmips-automatically-detect-RAM-size.patch | 10 +- .../203-mips-bmips-dma-fix-CBR-address.patch | 82 --------- ...4-mips-bmips-enable-RAC-on-BMIPS4350.patch | 42 ----- 10 files changed, 386 insertions(+), 132 deletions(-) create mode 100644 target/linux/bmips/patches-6.6/010-v6.10-mips-bmips-BCM6358-make-sure-CBR-is-correctly-set.patch create mode 100644 target/linux/bmips/patches-6.6/020-v6.11-mips-bmips-rework-and-cache-CBR-addr-handling.patch create mode 100644 target/linux/bmips/patches-6.6/021-v6.11-mips-bmips-setup-make-CBR-address-configurable.patch create mode 100644 target/linux/bmips/patches-6.6/022-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch delete mode 100644 target/linux/bmips/patches-6.6/203-mips-bmips-dma-fix-CBR-address.patch delete mode 100644 target/linux/bmips/patches-6.6/204-mips-bmips-enable-RAC-on-BMIPS4350.patch diff --git a/target/linux/bmips/dts/bcm6358.dtsi b/target/linux/bmips/dts/bcm6358.dtsi index 43dc87c71d2e..d5dee7d15022 100644 --- a/target/linux/bmips/dts/bcm6358.dtsi +++ b/target/linux/bmips/dts/bcm6358.dtsi @@ -42,6 +42,7 @@ cpus { #address-cells = <1>; #size-cells = <0>; + mips-cbr-reg = <0xff400000>; mips-hpt-frequency = <150000000>; cpu@0 { diff --git a/target/linux/bmips/dts/bcm6368.dtsi b/target/linux/bmips/dts/bcm6368.dtsi index cf2f5b081b9d..84300c980ab0 100644 --- a/target/linux/bmips/dts/bcm6368.dtsi +++ b/target/linux/bmips/dts/bcm6368.dtsi @@ -43,6 +43,7 @@ cpus { #address-cells = <1>; #size-cells = <0>; + mips-cbr-reg = <0xff400000>; mips-hpt-frequency = <200000000>; cpu@0 { diff --git a/target/linux/bmips/patches-6.6/010-v6.10-mips-bmips-BCM6358-make-sure-CBR-is-correctly-set.patch b/target/linux/bmips/patches-6.6/010-v6.10-mips-bmips-BCM6358-make-sure-CBR-is-correctly-set.patch new file mode 100644 index 000000000000..0a5a7c24022d --- /dev/null +++ b/target/linux/bmips/patches-6.6/010-v6.10-mips-bmips-BCM6358-make-sure-CBR-is-correctly-set.patch @@ -0,0 +1,35 @@ +From ce5cdd3b05216b704a704f466fb4c2dff3778caf Mon Sep 17 00:00:00 2001 +From: Christian Marangi +Date: Tue, 11 Jun 2024 13:35:33 +0200 +Subject: [PATCH] mips: bmips: BCM6358: make sure CBR is correctly set + +It was discovered that some device have CBR address set to 0 causing +kernel panic when arch_sync_dma_for_cpu_all is called. + +This was notice in situation where the system is booted from TP1 and +BMIPS_GET_CBR() returns 0 instead of a valid address and +!!(read_c0_brcm_cmt_local() & (1 << 31)); not failing. + +The current check whether RAC flush should be disabled or not are not +enough hence lets check if CBR is a valid address or not. + +Fixes: ab327f8acdf8 ("mips: bmips: BCM6358: disable RAC flush for TP1") +Signed-off-by: Christian Marangi +Acked-by: Florian Fainelli +Signed-off-by: Thomas Bogendoerfer +--- + arch/mips/bmips/setup.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +--- a/arch/mips/bmips/setup.c ++++ b/arch/mips/bmips/setup.c +@@ -110,7 +110,8 @@ static void bcm6358_quirks(void) + * RAC flush causes kernel panics on BCM6358 when booting from TP1 + * because the bootloader is not initializing it properly. + */ +- bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)); ++ bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)) || ++ !!BMIPS_GET_CBR(); + } + + static void bcm6368_quirks(void) diff --git a/target/linux/bmips/patches-6.6/020-v6.11-mips-bmips-rework-and-cache-CBR-addr-handling.patch b/target/linux/bmips/patches-6.6/020-v6.11-mips-bmips-rework-and-cache-CBR-addr-handling.patch new file mode 100644 index 000000000000..21eaa3d6cb2d --- /dev/null +++ b/target/linux/bmips/patches-6.6/020-v6.11-mips-bmips-rework-and-cache-CBR-addr-handling.patch @@ -0,0 +1,171 @@ +From a5c05453a13ab324ad8719e8a23dfb6af01f3652 Mon Sep 17 00:00:00 2001 +From: Christian Marangi +Date: Thu, 20 Jun 2024 17:26:42 +0200 +Subject: [PATCH 1/4] mips: bmips: rework and cache CBR addr handling + +Rework the handling of the CBR address and cache it. This address +doesn't change and can be cached instead of reading the register every +time. + +This is in preparation of permitting to tweak the CBR address in DT with +broken SoC or bootloader. + +bmips_cbr_addr is defined in setup.c for each arch to keep compatibility +with legacy brcm47xx/brcm63xx and generic BMIPS target. + +Acked-by: Florian Fainelli +Signed-off-by: Christian Marangi +Signed-off-by: Thomas Bogendoerfer +--- + arch/mips/bcm47xx/prom.c | 3 +++ + arch/mips/bcm47xx/setup.c | 4 ++++ + arch/mips/bcm63xx/prom.c | 3 +++ + arch/mips/bcm63xx/setup.c | 4 ++++ + arch/mips/bmips/dma.c | 2 +- + arch/mips/bmips/setup.c | 7 ++++++- + arch/mips/include/asm/bmips.h | 1 + + arch/mips/kernel/smp-bmips.c | 4 ++-- + 8 files changed, 24 insertions(+), 4 deletions(-) + +--- a/arch/mips/bcm47xx/prom.c ++++ b/arch/mips/bcm47xx/prom.c +@@ -32,6 +32,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -109,6 +110,8 @@ static __init void prom_init_mem(void) + + void __init prom_init(void) + { ++ /* Cache CBR addr before CPU/DMA setup */ ++ bmips_cbr_addr = BMIPS_GET_CBR(); + prom_init_mem(); + setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0); + } +--- a/arch/mips/bcm47xx/setup.c ++++ b/arch/mips/bcm47xx/setup.c +@@ -37,6 +37,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -45,6 +46,9 @@ + #include + #include + ++/* CBR addr doesn't change and we can cache it */ ++void __iomem *bmips_cbr_addr __read_mostly; ++ + union bcm47xx_bus bcm47xx_bus; + EXPORT_SYMBOL(bcm47xx_bus); + +--- a/arch/mips/bcm63xx/prom.c ++++ b/arch/mips/bcm63xx/prom.c +@@ -22,6 +22,9 @@ void __init prom_init(void) + { + u32 reg, mask; + ++ /* Cache CBR addr before CPU/DMA setup */ ++ bmips_cbr_addr = BMIPS_GET_CBR(); ++ + bcm63xx_cpu_init(); + + /* stop any running watchdog */ +--- a/arch/mips/bcm63xx/setup.c ++++ b/arch/mips/bcm63xx/setup.c +@@ -12,6 +12,7 @@ + #include + #include + #include ++#include + #include + #include + #include +@@ -22,6 +23,9 @@ + #include + #include + ++/* CBR addr doesn't change and we can cache it */ ++void __iomem *bmips_cbr_addr __read_mostly; ++ + void bcm63xx_machine_halt(void) + { + pr_info("System halted\n"); +--- a/arch/mips/bmips/dma.c ++++ b/arch/mips/bmips/dma.c +@@ -9,7 +9,7 @@ bool bmips_rac_flush_disable; + + void arch_sync_dma_for_cpu_all(void) + { +- void __iomem *cbr = BMIPS_GET_CBR(); ++ void __iomem *cbr = bmips_cbr_addr; + u32 cfg; + + if (boot_cpu_type() != CPU_BMIPS3300 && +--- a/arch/mips/bmips/setup.c ++++ b/arch/mips/bmips/setup.c +@@ -34,6 +34,9 @@ + #define REG_BCM6328_OTP ((void __iomem *)CKSEG1ADDR(0x1000062c)) + #define BCM6328_TP1_DISABLED BIT(9) + ++/* CBR addr doesn't change and we can cache it */ ++void __iomem *bmips_cbr_addr __read_mostly; ++ + extern bool bmips_rac_flush_disable; + + static const unsigned long kbase = VMLINUX_LOAD_ADDRESS & 0xfff00000; +@@ -111,7 +114,7 @@ static void bcm6358_quirks(void) + * because the bootloader is not initializing it properly. + */ + bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)) || +- !!BMIPS_GET_CBR(); ++ !!bmips_cbr_addr; + } + + static void bcm6368_quirks(void) +@@ -144,6 +147,8 @@ static void __init bmips_init_cfe(void) + + void __init prom_init(void) + { ++ /* Cache CBR addr before CPU/DMA setup */ ++ bmips_cbr_addr = BMIPS_GET_CBR(); + bmips_init_cfe(); + bmips_cpu_setup(); + register_bmips_smp_ops(); +--- a/arch/mips/include/asm/bmips.h ++++ b/arch/mips/include/asm/bmips.h +@@ -81,6 +81,7 @@ extern char bmips_smp_movevec[]; + extern char bmips_smp_int_vec[]; + extern char bmips_smp_int_vec_end[]; + ++extern void __iomem *bmips_cbr_addr; + extern int bmips_smp_enabled; + extern int bmips_cpu_offset; + extern cpumask_t bmips_booted_mask; +--- a/arch/mips/kernel/smp-bmips.c ++++ b/arch/mips/kernel/smp-bmips.c +@@ -518,7 +518,7 @@ static void bmips_set_reset_vec(int cpu, + info.val = val; + bmips_set_reset_vec_remote(&info); + } else { +- void __iomem *cbr = BMIPS_GET_CBR(); ++ void __iomem *cbr = bmips_cbr_addr; + + if (cpu == 0) + __raw_writel(val, cbr + BMIPS_RELO_VECTOR_CONTROL_0); +@@ -591,7 +591,7 @@ asmlinkage void __weak plat_wired_tlb_se + + void bmips_cpu_setup(void) + { +- void __iomem __maybe_unused *cbr = BMIPS_GET_CBR(); ++ void __iomem __maybe_unused *cbr = bmips_cbr_addr; + u32 __maybe_unused cfg; + + switch (current_cpu_type()) { diff --git a/target/linux/bmips/patches-6.6/021-v6.11-mips-bmips-setup-make-CBR-address-configurable.patch b/target/linux/bmips/patches-6.6/021-v6.11-mips-bmips-setup-make-CBR-address-configurable.patch new file mode 100644 index 000000000000..10a710a31d74 --- /dev/null +++ b/target/linux/bmips/patches-6.6/021-v6.11-mips-bmips-setup-make-CBR-address-configurable.patch @@ -0,0 +1,111 @@ +From b95b30e50aed225d26e20737873ae2404941901c Mon Sep 17 00:00:00 2001 +From: Christian Marangi +Date: Thu, 20 Jun 2024 17:26:44 +0200 +Subject: [PATCH 3/4] mips: bmips: setup: make CBR address configurable + +Add support to provide CBR address from DT to handle broken +SoC/Bootloader that doesn't correctly init it. This permits to use the +RAC flush even in these condition. + +To provide a CBR address from DT, the property "brcm,bmips-cbr-reg" +needs to be set in the "cpus" node. On DT init, this property presence +will be checked and will set the bmips_cbr_addr value accordingly. Also +bmips_rac_flush_disable will be set to false as RAC flush can be +correctly supported. + +The CBR address from DT will overwrite the cached one and the +one set in the CBR register will be ignored. + +Also the DT CBR address is validated on being outside DRAM window. + +Signed-off-by: Christian Marangi +Acked-by: Florian Fainelli +Signed-off-by: Thomas Bogendoerfer +--- + arch/mips/bcm47xx/setup.c | 6 +++++- + arch/mips/bcm63xx/setup.c | 6 +++++- + arch/mips/bmips/setup.c | 30 ++++++++++++++++++++++++++++-- + 3 files changed, 38 insertions(+), 4 deletions(-) + +--- a/arch/mips/bcm47xx/setup.c ++++ b/arch/mips/bcm47xx/setup.c +@@ -46,7 +46,11 @@ + #include + #include + +-/* CBR addr doesn't change and we can cache it */ ++/* ++ * CBR addr doesn't change and we can cache it. ++ * For broken SoC/Bootloader CBR addr might also be provided via DT ++ * with "brcm,bmips-cbr-reg" in the "cpus" node. ++ */ + void __iomem *bmips_cbr_addr __read_mostly; + + union bcm47xx_bus bcm47xx_bus; +--- a/arch/mips/bcm63xx/setup.c ++++ b/arch/mips/bcm63xx/setup.c +@@ -23,7 +23,11 @@ + #include + #include + +-/* CBR addr doesn't change and we can cache it */ ++/* ++ * CBR addr doesn't change and we can cache it. ++ * For broken SoC/Bootloader CBR addr might also be provided via DT ++ * with "brcm,bmips-cbr-reg" in the "cpus" node. ++ */ + void __iomem *bmips_cbr_addr __read_mostly; + + void bcm63xx_machine_halt(void) +--- a/arch/mips/bmips/setup.c ++++ b/arch/mips/bmips/setup.c +@@ -34,7 +34,11 @@ + #define REG_BCM6328_OTP ((void __iomem *)CKSEG1ADDR(0x1000062c)) + #define BCM6328_TP1_DISABLED BIT(9) + +-/* CBR addr doesn't change and we can cache it */ ++/* ++ * CBR addr doesn't change and we can cache it. ++ * For broken SoC/Bootloader CBR addr might also be provided via DT ++ * with "brcm,bmips-cbr-reg" in the "cpus" node. ++ */ + void __iomem *bmips_cbr_addr __read_mostly; + + extern bool bmips_rac_flush_disable; +@@ -208,13 +212,35 @@ void __init plat_mem_setup(void) + void __init device_tree_init(void) + { + struct device_node *np; ++ u32 addr; + + unflatten_and_copy_device_tree(); + + /* Disable SMP boot unless both CPUs are listed in DT and !disabled */ + np = of_find_node_by_name(NULL, "cpus"); +- if (np && of_get_available_child_count(np) <= 1) ++ if (!np) ++ return; ++ ++ if (of_get_available_child_count(np) <= 1) + bmips_smp_enabled = 0; ++ ++ /* Check if DT provide a CBR address */ ++ if (of_property_read_u32(np, "brcm,bmips-cbr-reg", &addr)) ++ goto exit; ++ ++ /* Make sure CBR address is outside DRAM window */ ++ if (addr >= (u32)memblock_start_of_DRAM() && ++ addr < (u32)memblock_end_of_DRAM()) { ++ WARN(1, "DT CBR %x inside DRAM window. Ignoring DT CBR.\n", ++ addr); ++ goto exit; ++ } ++ ++ bmips_cbr_addr = (void __iomem *)addr; ++ /* Since CBR is provided by DT, enable RAC flush */ ++ bmips_rac_flush_disable = false; ++ ++exit: + of_node_put(np); + } + diff --git a/target/linux/bmips/patches-6.6/022-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch b/target/linux/bmips/patches-6.6/022-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch new file mode 100644 index 000000000000..2af45df2592e --- /dev/null +++ b/target/linux/bmips/patches-6.6/022-v6.11-mips-bmips-enable-RAC-on-BMIPS4350.patch @@ -0,0 +1,57 @@ +From 04f38d1a4db017f17e82442727b91ce03dd72759 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= +Date: Thu, 20 Jun 2024 17:26:45 +0200 +Subject: [PATCH 4/4] mips: bmips: enable RAC on BMIPS4350 +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The data RAC is left disabled by the bootloader in some SoCs, at least in +the core it boots from. +Enabling this feature increases the performance up to +30% depending on the +task. + +Signed-off-by: Daniel González Cabanelas +Signed-off-by: Álvaro Fernández Rojas +[ rework code and reduce code duplication ] +Acked-by: Florian Fainelli +Signed-off-by: Christian Marangi +Signed-off-by: Thomas Bogendoerfer +--- + arch/mips/kernel/smp-bmips.c | 18 ++++++++++++++++++ + 1 file changed, 18 insertions(+) + +--- a/arch/mips/kernel/smp-bmips.c ++++ b/arch/mips/kernel/smp-bmips.c +@@ -592,6 +592,7 @@ asmlinkage void __weak plat_wired_tlb_se + void bmips_cpu_setup(void) + { + void __iomem __maybe_unused *cbr = bmips_cbr_addr; ++ u32 __maybe_unused rac_addr; + u32 __maybe_unused cfg; + + switch (current_cpu_type()) { +@@ -620,6 +621,23 @@ void bmips_cpu_setup(void) + __raw_readl(cbr + BMIPS_RAC_ADDRESS_RANGE); + break; + ++ case CPU_BMIPS4350: ++ rac_addr = BMIPS_RAC_CONFIG_1; ++ ++ if (!(read_c0_brcm_cmt_local() & (1 << 31))) ++ rac_addr = BMIPS_RAC_CONFIG; ++ ++ /* Enable data RAC */ ++ cfg = __raw_readl(cbr + rac_addr); ++ __raw_writel(cfg | 0xf, cbr + rac_addr); ++ __raw_readl(cbr + rac_addr); ++ ++ /* Flush stale data out of the readahead cache */ ++ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); ++ __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG); ++ __raw_readl(cbr + BMIPS_RAC_CONFIG); ++ break; ++ + case CPU_BMIPS4380: + /* CBG workaround for early BMIPS4380 CPUs */ + switch (read_c0_prid()) { diff --git a/target/linux/bmips/patches-6.6/200-mips-bmips-automatically-detect-CPU-frequency.patch b/target/linux/bmips/patches-6.6/200-mips-bmips-automatically-detect-CPU-frequency.patch index 5b2506e9c931..53a62e56bb4f 100644 --- a/target/linux/bmips/patches-6.6/200-mips-bmips-automatically-detect-CPU-frequency.patch +++ b/target/linux/bmips/patches-6.6/200-mips-bmips-automatically-detect-CPU-frequency.patch @@ -15,7 +15,7 @@ Signed-off-by: Álvaro Fernández Rojas --- a/arch/mips/bmips/setup.c +++ b/arch/mips/bmips/setup.c -@@ -31,13 +31,52 @@ +@@ -31,8 +31,42 @@ #define RELO_NORMAL_VEC BIT(18) @@ -56,7 +56,9 @@ Signed-off-by: Álvaro Fernández Rojas +#define BCM63268_FCVO_SHIFT 21 +#define BCM63268_FCVO_MASK (0xf << BCM63268_FCVO_SHIFT) - extern bool bmips_rac_flush_disable; + /* + * CBR addr doesn't change and we can cache it. +@@ -45,6 +79,11 @@ extern bool bmips_rac_flush_disable; static const unsigned long kbase = VMLINUX_LOAD_ADDRESS & 0xfff00000; @@ -68,7 +70,7 @@ Signed-off-by: Álvaro Fernández Rojas struct bmips_quirk { const char *compatible; void (*quirk_fn)(void); -@@ -153,17 +192,161 @@ const char *get_system_type(void) +@@ -163,17 +202,161 @@ const char *get_system_type(void) return "Generic BMIPS kernel"; } diff --git a/target/linux/bmips/patches-6.6/201-mips-bmips-automatically-detect-RAM-size.patch b/target/linux/bmips/patches-6.6/201-mips-bmips-automatically-detect-RAM-size.patch index a46eb0e4760b..fb2dab73dbde 100644 --- a/target/linux/bmips/patches-6.6/201-mips-bmips-automatically-detect-RAM-size.patch +++ b/target/linux/bmips/patches-6.6/201-mips-bmips-automatically-detect-RAM-size.patch @@ -70,9 +70,9 @@ Signed-off-by: Álvaro Fernández Rojas + +#define DDR_CSEND_REG 0x8 - extern bool bmips_rac_flush_disable; - -@@ -77,6 +98,11 @@ struct bmips_cpufreq { + /* + * CBR addr doesn't change and we can cache it. +@@ -84,6 +105,11 @@ struct bmips_cpufreq { u32 (*cpu_freq)(void); }; @@ -84,7 +84,7 @@ Signed-off-by: Álvaro Fernández Rojas struct bmips_quirk { const char *compatible; void (*quirk_fn)(void); -@@ -351,9 +377,90 @@ void __init plat_time_init(void) +@@ -361,9 +387,90 @@ void __init plat_time_init(void) mips_hpt_frequency = freq; } @@ -175,7 +175,7 @@ Signed-off-by: Álvaro Fernández Rojas const struct bmips_quirk *q; set_io_port_base(0); -@@ -374,6 +481,18 @@ void __init plat_mem_setup(void) +@@ -384,6 +491,18 @@ void __init plat_mem_setup(void) __dt_setup_arch(dtb); diff --git a/target/linux/bmips/patches-6.6/203-mips-bmips-dma-fix-CBR-address.patch b/target/linux/bmips/patches-6.6/203-mips-bmips-dma-fix-CBR-address.patch deleted file mode 100644 index 9b477e45f9b6..000000000000 --- a/target/linux/bmips/patches-6.6/203-mips-bmips-dma-fix-CBR-address.patch +++ /dev/null @@ -1,82 +0,0 @@ -From 3e4c3863e0cfb8c2abdff6bb494ca69d3d2aed9c Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= -Date: Sat, 10 Jun 2023 17:01:40 +0200 -Subject: [PATCH] mips: bmips: dma: fix CBR address -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Some BCM63xx SoCs may return CBR address as 0. - -Signed-off-by: Álvaro Fernández Rojas ---- - arch/mips/bmips/dma.c | 12 ++++-------- - arch/mips/bmips/setup.c | 11 ++++------- - 2 files changed, 8 insertions(+), 15 deletions(-) - ---- a/arch/mips/bmips/dma.c -+++ b/arch/mips/bmips/dma.c -@@ -5,11 +5,10 @@ - #include - #include - --bool bmips_rac_flush_disable; -+void __iomem *bmips_cbr_addr; - - void arch_sync_dma_for_cpu_all(void) - { -- void __iomem *cbr = BMIPS_GET_CBR(); - u32 cfg; - - if (boot_cpu_type() != CPU_BMIPS3300 && -@@ -17,11 +16,8 @@ void arch_sync_dma_for_cpu_all(void) - boot_cpu_type() != CPU_BMIPS4380) - return; - -- if (unlikely(bmips_rac_flush_disable)) -- return; -- - /* Flush stale data out of the readahead cache */ -- cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); -- __raw_writel(cfg | 0x100, cbr + BMIPS_RAC_CONFIG); -- __raw_readl(cbr + BMIPS_RAC_CONFIG); -+ cfg = __raw_readl(bmips_cbr_addr + BMIPS_RAC_CONFIG); -+ __raw_writel(cfg | 0x100, bmips_cbr_addr + BMIPS_RAC_CONFIG); -+ __raw_readl(bmips_cbr_addr + BMIPS_RAC_CONFIG); - } ---- a/arch/mips/bmips/setup.c -+++ b/arch/mips/bmips/setup.c -@@ -89,7 +89,7 @@ - - #define DDR_CSEND_REG 0x8 - --extern bool bmips_rac_flush_disable; -+extern void __iomem *bmips_cbr_addr; - - static const unsigned long kbase = VMLINUX_LOAD_ADDRESS & 0xfff00000; - -@@ -170,12 +170,6 @@ static void bcm6358_quirks(void) - * disable SMP for now - */ - bmips_smp_enabled = 0; -- -- /* -- * RAC flush causes kernel panics on BCM6358 when booting from TP1 -- * because the bootloader is not initializing it properly. -- */ -- bmips_rac_flush_disable = !!(read_c0_brcm_cmt_local() & (1 << 31)); - } - - static void bcm6368_quirks(void) -@@ -208,6 +202,11 @@ static void __init bmips_init_cfe(void) - - void __init prom_init(void) - { -+ if (!(read_c0_brcm_cbr() >> 18)) -+ bmips_cbr_addr = (void __iomem *) 0xff400000; -+ else -+ bmips_cbr_addr = BMIPS_GET_CBR(); -+ - bmips_init_cfe(); - bmips_cpu_setup(); - register_bmips_smp_ops(); diff --git a/target/linux/bmips/patches-6.6/204-mips-bmips-enable-RAC-on-BMIPS4350.patch b/target/linux/bmips/patches-6.6/204-mips-bmips-enable-RAC-on-BMIPS4350.patch deleted file mode 100644 index 1ec496c15e63..000000000000 --- a/target/linux/bmips/patches-6.6/204-mips-bmips-enable-RAC-on-BMIPS4350.patch +++ /dev/null @@ -1,42 +0,0 @@ -From 7f862eaedac56b67972393f0a9affcd2fe53479b Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= -Date: Sun, 18 Jun 2023 19:59:25 +0200 -Subject: [PATCH] mips: bmips: enable RAC on BMIPS4350 -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -The data RAC is left disabled by the bootloader in some SoCs, at least in -the core it boots from. -Enabling this feature increases the performance up to +30% depending on the -task. - -Signed-off-by: Daniel González Cabanelas -Signed-off-by: Álvaro Fernández Rojas ---- - arch/mips/kernel/smp-bmips.c | 14 ++++++++++++++ - 1 file changed, 14 insertions(+) - ---- a/arch/mips/kernel/smp-bmips.c -+++ b/arch/mips/kernel/smp-bmips.c -@@ -620,6 +620,20 @@ void bmips_cpu_setup(void) - __raw_readl(cbr + BMIPS_RAC_ADDRESS_RANGE); - break; - -+ case CPU_BMIPS4350: -+ /* Enable data RAC */ -+ if (!(read_c0_brcm_cmt_local() & (1 << 31))) { -+ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG); -+ __raw_writel(cfg | 0xa, cbr + BMIPS_RAC_CONFIG); -+ __raw_readl(cbr + BMIPS_RAC_CONFIG); -+ } else { -+ cbr = (void __iomem *)0xff400000; -+ cfg = __raw_readl(cbr + BMIPS_RAC_CONFIG_1); -+ __raw_writel(cfg | 0xa, cbr + BMIPS_RAC_CONFIG_1); -+ __raw_readl(cbr + BMIPS_RAC_CONFIG_1); -+ } -+ break; -+ - case CPU_BMIPS4380: - /* CBG workaround for early BMIPS4380 CPUs */ - switch (read_c0_prid()) { -- 2.30.2