From b7b8410a8fee9eda7b062a86a07dda0b97c49f8a Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Thu, 17 Nov 2016 01:02:57 +0100 Subject: ls2080: Exit dpaa only right before exiting U-Boot On ls2080 we have a separate network fabric component which we need to shut down before we enter Linux (or any other OS). Along with that also comes configuration of the fabric using a description file. Today we always stop and configure the fabric in the boot script and (again) exit it on device tree generation. This works ok for the normal booti case, but with bootefi the payload we're running may still want to access the network. So let's add a new fsl_mc command that defers configuration and stopping the hardware to when we actually exit U-Boot, so that we can still use the fabric from an EFI payload. For existing boot scripts, nothing should change with this patch. Signed-off-by: Alexander Graf Reviewed-by: York Sun [agraf: Fix x86 build] --- arch/arm/lib/bootm.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/arm/lib/bootm.c') diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index 53c3141322a..dedcd1e9a4b 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -64,6 +64,10 @@ void arch_lmb_reserve(struct lmb *lmb) gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size - sp); } +__weak void board_quiesce_devices(void) +{ +} + /** * announce_and_cleanup() - Print message and prepare for kernel boot * @@ -84,6 +88,9 @@ static void announce_and_cleanup(int fake) #ifdef CONFIG_USB_DEVICE udc_disconnect(); #endif + + board_quiesce_devices(); + cleanup_before_linux(); } -- cgit v1.2.3 From ec6617c39741adc6c54952564579e32c3c09c66f Mon Sep 17 00:00:00 2001 From: Alison Wang Date: Thu, 10 Nov 2016 10:49:03 +0800 Subject: armv8: Support loading 32-bit OS in AArch32 execution state To support loading a 32-bit OS, the execution state will change from AArch64 to AArch32 when jumping to kernel. The architecture information will be got through checking FIT image, then U-Boot will load 32-bit OS or 64-bit OS automatically. Signed-off-by: Ebony Zhu Signed-off-by: Alison Wang Signed-off-by: Chenhui Zhao Reviewed-by: York Sun --- arch/arm/lib/bootm.c | 39 ++++++++++++++++++++++++++++++++++----- 1 file changed, 34 insertions(+), 5 deletions(-) (limited to 'arch/arm/lib/bootm.c') diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index dedcd1e9a4b..6f3be8b528c 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -200,10 +200,6 @@ static void do_nonsec_virt_switch(void) { smp_kick_all_cpus(); dcache_disable(); /* flush cache before swtiching to EL2 */ - armv8_switch_to_el2(); -#ifdef CONFIG_ARMV8_SWITCH_TO_EL1 - armv8_switch_to_el1(); -#endif } #endif @@ -280,6 +276,24 @@ bool armv7_boot_nonsec(void) } #endif +#ifdef CONFIG_ARM64 +#ifdef CONFIG_ARMV8_SWITCH_TO_EL1 +static void switch_to_el1(void) +{ + if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && + (images.os.arch == IH_ARCH_ARM)) + armv8_switch_to_el1(0, (u64)gd->bd->bi_arch_number, + (u64)images.ft_addr, + (u64)images.ep, + ES_TO_AARCH32); + else + armv8_switch_to_el1((u64)images.ft_addr, 0, 0, + images.ep, + ES_TO_AARCH64); +} +#endif +#endif + /* Subcommand: GO */ static void boot_jump_linux(bootm_headers_t *images, int flag) { @@ -299,7 +313,22 @@ static void boot_jump_linux(bootm_headers_t *images, int flag) if (!fake) { do_nonsec_virt_switch(); - kernel_entry(images->ft_addr, NULL, NULL, NULL); + +#ifdef CONFIG_ARMV8_SWITCH_TO_EL1 + armv8_switch_to_el2((u64)images->ft_addr, 0, 0, + (u64)switch_to_el1, ES_TO_AARCH64); +#else + if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && + (images->os.arch == IH_ARCH_ARM)) + armv8_switch_to_el2(0, (u64)gd->bd->bi_arch_number, + (u64)images->ft_addr, + (u64)images->ep, + ES_TO_AARCH32); + else + armv8_switch_to_el2((u64)images->ft_addr, 0, 0, + images->ep, + ES_TO_AARCH64); +#endif } #else unsigned long machid = gd->bd->bi_arch_number; -- cgit v1.2.3 From e2c18e40b111470fbe1aca47b58570099695f10a Mon Sep 17 00:00:00 2001 From: Alison Wang Date: Thu, 10 Nov 2016 10:49:04 +0800 Subject: armv8: fsl-layerscape: SMP support for loading 32-bit OS Spin-table method is used for secondary cores to load 32-bit OS. The architecture information will be got through checking FIT image and saved in the os_arch element of spin-table, then the secondary cores will check os_arch and jump to 32-bit OS or 64-bit OS automatically. Signed-off-by: Alison Wang Signed-off-by: Chenhui Zhao Reviewed-by: York Sun --- arch/arm/lib/bootm.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/arm/lib/bootm.c') diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c index 6f3be8b528c..35e6b06733b 100644 --- a/arch/arm/lib/bootm.c +++ b/arch/arm/lib/bootm.c @@ -277,6 +277,10 @@ bool armv7_boot_nonsec(void) #endif #ifdef CONFIG_ARM64 +__weak void update_os_arch_secondary_cores(uint8_t os_arch) +{ +} + #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 static void switch_to_el1(void) { @@ -314,6 +318,8 @@ static void boot_jump_linux(bootm_headers_t *images, int flag) if (!fake) { do_nonsec_virt_switch(); + update_os_arch_secondary_cores(images->os.arch); + #ifdef CONFIG_ARMV8_SWITCH_TO_EL1 armv8_switch_to_el2((u64)images->ft_addr, 0, 0, (u64)switch_to_el1, ES_TO_AARCH64); -- cgit v1.2.3