diff options
Diffstat (limited to 'package/boot/uboot-layerscape/patches/0001-armv8-Support-loading-32-bit-OS-in-AArch32-execution.patch')
| -rw-r--r-- | package/boot/uboot-layerscape/patches/0001-armv8-Support-loading-32-bit-OS-in-AArch32-execution.patch | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/package/boot/uboot-layerscape/patches/0001-armv8-Support-loading-32-bit-OS-in-AArch32-execution.patch b/package/boot/uboot-layerscape/patches/0001-armv8-Support-loading-32-bit-OS-in-AArch32-execution.patch new file mode 100644 index 0000000000..ace542890a --- /dev/null +++ b/package/boot/uboot-layerscape/patches/0001-armv8-Support-loading-32-bit-OS-in-AArch32-execution.patch @@ -0,0 +1,214 @@ +From e03f571b1e9564ca422134b2013d80c8373c9db2 Mon Sep 17 00:00:00 2001 +From: Alison Wang <b18965@freescale.com> +Date: Fri, 13 May 2016 10:19:24 +0800 +Subject: [PATCH 01/93] 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 <ebony.zhu@nxp.com> +Signed-off-by: Alison Wang <alison.wang@nxp.com> +Signed-off-by: Chenhui Zhao <chenhui.zhao@nxp.com> +--- + arch/arm/cpu/armv8/transition.S | 100 +++++++++++++++++++++++++++++++++++++++ + arch/arm/include/asm/system.h | 2 + + arch/arm/lib/bootm.c | 20 +++++++- + common/image-fit.c | 12 ++++- + 4 files changed, 131 insertions(+), 3 deletions(-) + +diff --git a/arch/arm/cpu/armv8/transition.S b/arch/arm/cpu/armv8/transition.S +index 253a39b..9d7a17a 100644 +--- a/arch/arm/cpu/armv8/transition.S ++++ b/arch/arm/cpu/armv8/transition.S +@@ -21,3 +21,103 @@ ENTRY(armv8_switch_to_el1) + 0: ret + 1: armv8_switch_to_el1_m x0, x1 + ENDPROC(armv8_switch_to_el1) ++ ++/* ++ * x0: kernel entry point ++ * x1: machine nr ++ * x2: fdt address ++ */ ++ENTRY(armv8_switch_to_el2_aarch32) ++ switch_el x3, 1f, 0f, 0f ++0: ret ++1: ++ mov x7, x0 ++ mov x8, x1 ++ mov x9, x2 ++ ++ /* 32bit EL2 | HCE | SMD | RES1 (Bits[5:4]) | Non-secure EL0/EL1 */ ++ mov x1, 0x1b1 ++ msr scr_el3, x1 ++ msr cptr_el3, xzr /* Disable coprocessor traps to EL3 */ ++ mov x1, 0x33ff ++ msr cptr_el2, x1 /* Disable coprocessor traps to EL2 */ ++ ++ /* Initialize Generic Timers */ ++ msr cntvoff_el2, xzr ++ ++ mov x1, #0x0830 ++ movk x1, #0x30c5, lsl #16 ++ msr sctlr_el2, x1 ++ ++ /* Return to AArch32 Hypervisor mode */ ++ mov x1, sp ++ msr sp_el2, x1 ++ mrs x1, vbar_el3 ++ msr vbar_el2, x1 /* Migrate VBAR */ ++ mov x1, #0x1da ++ msr spsr_el3, x1 ++ msr elr_el3, x7 ++ ++ mov x0, #0 ++ mov x1, x8 ++ mov x2, x9 ++ ++ eret ++ENDPROC(armv8_switch_to_el2_aarch32) ++ ++/* ++ * x0: kernel entry point ++ * x1: machine nr ++ * x2: fdt address ++ */ ++ENTRY(armv8_switch_to_el1_aarch32) ++ switch_el x3, 0f, 1f, 0f ++0: ret ++1: ++ mov x7, x0 ++ mov x8, x1 ++ mov x9, x2 ++ ++ /* Initialize Generic Timers */ ++ mrs x0, cnthctl_el2 ++ orr x0, x0, #0x3 /* Enable EL1 access to timers */ ++ msr cnthctl_el2, x0 ++ msr cntvoff_el2, xzr ++ ++ /* Initialize MPID/MPIDR registers */ ++ mrs x0, midr_el1 ++ mrs x1, mpidr_el1 ++ msr vpidr_el2, x0 ++ msr vmpidr_el2, x1 ++ ++ /* Disable coprocessor traps */ ++ mov x0, #0x33ff ++ msr cptr_el2, x0 /* Disable coprocessor traps to EL2 */ ++ msr hstr_el2, xzr /* Disable coprocessor traps to EL2 */ ++ mov x0, #3 << 20 ++ msr cpacr_el1, x0 /* Enable FP/SIMD at EL1 */ ++ ++ /* Initialize HCR_EL2 */ ++ mov x0, #(0 << 31) /* 32bit EL1 */ ++ orr x0, x0, #(1 << 29) /* Disable HVC */ ++ msr hcr_el2, x0 ++ ++ mov x0, #0x0800 ++ movk x0, #0x30d0, lsl #16 ++ msr sctlr_el1, x0 ++ ++ /* Return to AArch32 Supervisor mode */ ++ mov x0, sp ++ msr sp_el1, x0 /* Migrate SP */ ++ mrs x0, vbar_el2 ++ msr vbar_el1, x0 /* Migrate VBAR */ ++ mov x0, #0x1d3 ++ msr spsr_el2, x0 ++ msr elr_el2, x7 ++ ++ mov x0, #0 ++ mov x1, x8 ++ mov x2, x9 ++ ++ eret ++ENDPROC(armv8_switch_to_el1_aarch32) +diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h +index 71b3108..0ecbcf7 100644 +--- a/arch/arm/include/asm/system.h ++++ b/arch/arm/include/asm/system.h +@@ -81,6 +81,8 @@ int __asm_flush_l3_cache(void); + + void armv8_switch_to_el2(void); + void armv8_switch_to_el1(void); ++void armv8_switch_to_el2_aarch32(u64 entry_point, u64 mach_nr, u64 fdt_addr); ++void armv8_switch_to_el1_aarch32(u64 entry_point, u64 mach_nr, u64 fdt_addr); + void gic_init(void); + void gic_send_sgi(unsigned long sgino); + void wait_for_wakeup(void); +diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c +index a477cae..36f2cb0 100644 +--- a/arch/arm/lib/bootm.c ++++ b/arch/arm/lib/bootm.c +@@ -276,8 +276,24 @@ static void boot_jump_linux(bootm_headers_t *images, int flag) + announce_and_cleanup(fake); + + if (!fake) { +- do_nonsec_virt_switch(); +- kernel_entry(images->ft_addr, NULL, NULL, NULL); ++ if ((IH_ARCH_DEFAULT == IH_ARCH_ARM64) && ++ (images->os.arch == IH_ARCH_ARM)) { ++ smp_kick_all_cpus(); ++ dcache_disable(); ++#ifdef CONFIG_ARMV8_SWITCH_TO_EL1 ++ armv8_switch_to_el2(); ++ armv8_switch_to_el1_aarch32((u64)images->ep, ++ (u64)gd->bd->bi_arch_number, ++ (u64)images->ft_addr); ++#else ++ armv8_switch_to_el2_aarch32((u64)images->ep, ++ (u64)gd->bd->bi_arch_number, ++ (u64)images->ft_addr); ++#endif ++ } else { ++ do_nonsec_virt_switch(); ++ kernel_entry(images->ft_addr, NULL, NULL, NULL); ++ } + } + #else + unsigned long machid = gd->bd->bi_arch_number; +diff --git a/common/image-fit.c b/common/image-fit.c +index c531ee7..0d54f71 100644 +--- a/common/image-fit.c ++++ b/common/image-fit.c +@@ -1144,7 +1144,8 @@ int fit_image_check_arch(const void *fit, int noffset, uint8_t arch) + if (fit_image_get_arch(fit, noffset, &image_arch)) + return 0; + return (arch == image_arch) || +- (arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64); ++ (arch == IH_ARCH_I386 && image_arch == IH_ARCH_X86_64) || ++ (arch == IH_ARCH_ARM64 && image_arch == IH_ARCH_ARM); + } + + /** +@@ -1567,6 +1568,9 @@ int fit_image_load(bootm_headers_t *images, ulong addr, + int type_ok, os_ok; + ulong load, data, len; + uint8_t os; ++#ifndef USE_HOSTCC ++ uint8_t os_arch; ++#endif + const char *prop_name; + int ret; + +@@ -1650,6 +1654,12 @@ int fit_image_load(bootm_headers_t *images, ulong addr, + return -ENOEXEC; + } + #endif ++ ++#ifndef USE_HOSTCC ++ fit_image_get_arch(fit, noffset, &os_arch); ++ images->os.arch = os_arch; ++#endif ++ + if (image_type == IH_TYPE_FLATDT && + !fit_image_check_comp(fit, noffset, IH_COMP_NONE)) { + puts("FDT image is compressed"); +-- +1.7.9.5 + |