[PATCH v6 net-next,mips 3/7] MIPS: Octeon: Automatically provision CVMSEG space.
Remove CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE and automatically calculate the amount of CVMSEG space needed. 1st 128-bytes: Use by IOBDMA 2nd 128-bytes: Reserved by kernel for scratch/TLS emulation. 3rd 128-bytes: OCTEON-III LMTLINE New config variable CONFIG_CAVIUM_OCTEON_EXTRA_CVMSEG provisions additional lines, defaults to zero. Signed-off-by: David DaneySigned-off-by: Carlos Munoz --- arch/mips/cavium-octeon/Kconfig| 27 arch/mips/cavium-octeon/setup.c| 16 ++-- .../asm/mach-cavium-octeon/kernel-entry-init.h | 20 +-- arch/mips/include/asm/mipsregs.h | 2 ++ arch/mips/include/asm/octeon/octeon.h | 2 ++ arch/mips/include/asm/processor.h | 2 +- arch/mips/kernel/octeon_switch.S | 2 -- arch/mips/mm/tlbex.c | 29 ++ drivers/staging/octeon/ethernet-defines.h | 2 +- 9 files changed, 50 insertions(+), 52 deletions(-) diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig index 204a1670fd9b..a50d1aa5863b 100644 --- a/arch/mips/cavium-octeon/Kconfig +++ b/arch/mips/cavium-octeon/Kconfig @@ -11,21 +11,26 @@ config CAVIUM_CN63XXP1 non-CN63XXP1 hardware, so it is recommended to select "n" unless it is known the workarounds are needed. -config CAVIUM_OCTEON_CVMSEG_SIZE - int "Number of L1 cache lines reserved for CVMSEG memory" - range 0 54 - default 1 - help - CVMSEG LM is a segment that accesses portions of the dcache as a - local memory; the larger CVMSEG is, the smaller the cache is. - This selects the size of CVMSEG LM, which is in cache blocks. The - legally range is from zero to 54 cache blocks (i.e. CVMSEG LM is - between zero and 6192 bytes). - endif # CPU_CAVIUM_OCTEON if CAVIUM_OCTEON_SOC +config CAVIUM_OCTEON_EXTRA_CVMSEG + int "Number of extra L1 cache lines reserved for CVMSEG memory" + range 0 50 + default 0 + help + CVMSEG LM is a segment that accesses portions of the dcache + as a local memory; the larger CVMSEG is, the smaller the + cache is. The kernel uses two or three blocks (one for TLB + exception handlers, one for driver IOBDMA operations, and on + models that need it, one for LMTDMA operations). This + selects an optional extra number of CVMSEG lines for use by + other software. + + Normally no extra lines are required, and this parameter + should be set to zero. + config CAVIUM_OCTEON_LOCK_L2 bool "Lock often used kernel code in the L2" default "y" diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c index 99e6a68bc652..51c4d3c3cada 100644 --- a/arch/mips/cavium-octeon/setup.c +++ b/arch/mips/cavium-octeon/setup.c @@ -68,6 +68,12 @@ extern void pci_console_init(const char *arg); static unsigned long long max_memory = ULLONG_MAX; static unsigned long long reserve_low_mem; +/* + * modified in hernel-entry-init.h, must have an initial value to keep + * it from being clobbered when bss is zeroed. + */ +u32 octeon_cvmseg_lines = 2; + DEFINE_SEMAPHORE(octeon_bootbus_sem); EXPORT_SYMBOL(octeon_bootbus_sem); @@ -604,11 +610,7 @@ void octeon_user_io_init(void) /* R/W If set, CVMSEG is available for loads/stores in * kernel/debug mode. */ -#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 cvmmemctl.s.cvmsegenak = 1; -#else - cvmmemctl.s.cvmsegenak = 0; -#endif if (OCTEON_IS_OCTEON3()) { /* Enable LMTDMA */ cvmmemctl.s.lmtena = 1; @@ -626,9 +628,9 @@ void octeon_user_io_init(void) /* Setup of CVMSEG is done in kernel-entry-init.h */ if (smp_processor_id() == 0) - pr_notice("CVMSEG size: %d cache lines (%d bytes)\n", - CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE, - CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128); + pr_notice("CVMSEG size: %u cache lines (%u bytes)\n", + octeon_cvmseg_lines, + octeon_cvmseg_lines * 128); if (octeon_has_feature(OCTEON_FEATURE_FAU)) { union cvmx_iob_fau_timeout fau_timeout; diff --git a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h index c38b38ce5a3d..cdcca60978a2 100644 --- a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h @@ -26,11 +26,18 @@ # a3 = address of boot descriptor block .set push .set arch=octeon + mfc0v1, CP0_PRID_REG + andiv1, 0xff00 + li v0, 0x9500 # cn78XX or later + subuv1, v1, v0 +
[PATCH v6 net-next,mips 3/7] MIPS: Octeon: Automatically provision CVMSEG space.
Remove CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE and automatically calculate the amount of CVMSEG space needed. 1st 128-bytes: Use by IOBDMA 2nd 128-bytes: Reserved by kernel for scratch/TLS emulation. 3rd 128-bytes: OCTEON-III LMTLINE New config variable CONFIG_CAVIUM_OCTEON_EXTRA_CVMSEG provisions additional lines, defaults to zero. Signed-off-by: David Daney Signed-off-by: Carlos Munoz --- arch/mips/cavium-octeon/Kconfig| 27 arch/mips/cavium-octeon/setup.c| 16 ++-- .../asm/mach-cavium-octeon/kernel-entry-init.h | 20 +-- arch/mips/include/asm/mipsregs.h | 2 ++ arch/mips/include/asm/octeon/octeon.h | 2 ++ arch/mips/include/asm/processor.h | 2 +- arch/mips/kernel/octeon_switch.S | 2 -- arch/mips/mm/tlbex.c | 29 ++ drivers/staging/octeon/ethernet-defines.h | 2 +- 9 files changed, 50 insertions(+), 52 deletions(-) diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig index 204a1670fd9b..a50d1aa5863b 100644 --- a/arch/mips/cavium-octeon/Kconfig +++ b/arch/mips/cavium-octeon/Kconfig @@ -11,21 +11,26 @@ config CAVIUM_CN63XXP1 non-CN63XXP1 hardware, so it is recommended to select "n" unless it is known the workarounds are needed. -config CAVIUM_OCTEON_CVMSEG_SIZE - int "Number of L1 cache lines reserved for CVMSEG memory" - range 0 54 - default 1 - help - CVMSEG LM is a segment that accesses portions of the dcache as a - local memory; the larger CVMSEG is, the smaller the cache is. - This selects the size of CVMSEG LM, which is in cache blocks. The - legally range is from zero to 54 cache blocks (i.e. CVMSEG LM is - between zero and 6192 bytes). - endif # CPU_CAVIUM_OCTEON if CAVIUM_OCTEON_SOC +config CAVIUM_OCTEON_EXTRA_CVMSEG + int "Number of extra L1 cache lines reserved for CVMSEG memory" + range 0 50 + default 0 + help + CVMSEG LM is a segment that accesses portions of the dcache + as a local memory; the larger CVMSEG is, the smaller the + cache is. The kernel uses two or three blocks (one for TLB + exception handlers, one for driver IOBDMA operations, and on + models that need it, one for LMTDMA operations). This + selects an optional extra number of CVMSEG lines for use by + other software. + + Normally no extra lines are required, and this parameter + should be set to zero. + config CAVIUM_OCTEON_LOCK_L2 bool "Lock often used kernel code in the L2" default "y" diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c index 99e6a68bc652..51c4d3c3cada 100644 --- a/arch/mips/cavium-octeon/setup.c +++ b/arch/mips/cavium-octeon/setup.c @@ -68,6 +68,12 @@ extern void pci_console_init(const char *arg); static unsigned long long max_memory = ULLONG_MAX; static unsigned long long reserve_low_mem; +/* + * modified in hernel-entry-init.h, must have an initial value to keep + * it from being clobbered when bss is zeroed. + */ +u32 octeon_cvmseg_lines = 2; + DEFINE_SEMAPHORE(octeon_bootbus_sem); EXPORT_SYMBOL(octeon_bootbus_sem); @@ -604,11 +610,7 @@ void octeon_user_io_init(void) /* R/W If set, CVMSEG is available for loads/stores in * kernel/debug mode. */ -#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 cvmmemctl.s.cvmsegenak = 1; -#else - cvmmemctl.s.cvmsegenak = 0; -#endif if (OCTEON_IS_OCTEON3()) { /* Enable LMTDMA */ cvmmemctl.s.lmtena = 1; @@ -626,9 +628,9 @@ void octeon_user_io_init(void) /* Setup of CVMSEG is done in kernel-entry-init.h */ if (smp_processor_id() == 0) - pr_notice("CVMSEG size: %d cache lines (%d bytes)\n", - CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE, - CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128); + pr_notice("CVMSEG size: %u cache lines (%u bytes)\n", + octeon_cvmseg_lines, + octeon_cvmseg_lines * 128); if (octeon_has_feature(OCTEON_FEATURE_FAU)) { union cvmx_iob_fau_timeout fau_timeout; diff --git a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h index c38b38ce5a3d..cdcca60978a2 100644 --- a/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h +++ b/arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h @@ -26,11 +26,18 @@ # a3 = address of boot descriptor block .set push .set arch=octeon + mfc0v1, CP0_PRID_REG + andiv1, 0xff00 + li v0, 0x9500 # cn78XX or later + subuv1, v1, v0 + li t2, 2 +