bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 123 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0653-arm-Fix-annoying-.eh_frame-section-warnings.patch b/target/linux/bcm27xx/patches-5.15/950-0653-arm-Fix-annoying-.eh_frame-section-warnings.patch
new file mode 100644
index 0000000000..4a90eafc08
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0653-arm-Fix-annoying-.eh_frame-section-warnings.patch
@@ -0,0 +1,123 @@
+From 8dabc6eab444607a68d710f0b09942277095e219 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Wed, 12 Jan 2022 17:27:03 +0000
+Subject: [PATCH] arm: Fix annoying .eh_frame section warnings
+
+Replace the cfi directives with the UNWIND equivalents. This prevents
+the .eh_frame section from being created, eliminating the warnings.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/lib/memcpy_rpi.S  |  2 ++
+ arch/arm/lib/memcpymove.h  | 45 ++++++++++++--------------------------
+ arch/arm/lib/memmove_rpi.S |  2 ++
+ 3 files changed, 18 insertions(+), 31 deletions(-)
+
+--- a/arch/arm/lib/memcpy_rpi.S
++++ b/arch/arm/lib/memcpy_rpi.S
+@@ -27,6 +27,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+ */
+ 
+ #include <linux/linkage.h>
++#include <asm/assembler.h>
++#include <asm/unwind.h>
+ #include "arm-mem.h"
+ #include "memcpymove.h"
+ 
+--- a/arch/arm/lib/memcpymove.h
++++ b/arch/arm/lib/memcpymove.h
+@@ -280,6 +280,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+ 199:
+         pop     {DAT3, DAT4, DAT5, DAT6, DAT7}
+         pop     {D, DAT1, DAT2, pc}
++        UNWIND( .fnend )
+ .endm
+ 
+ .macro memcpy_medium_inner_loop  backwards, align
+@@ -358,19 +359,13 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+         LAST    .req    ip
+         OFF     .req    lr
+ 
+-        .cfi_startproc
++        UNWIND( .fnstart )
+ 
+         push    {D, DAT1, DAT2, lr}
++        UNWIND( .fnend )
+ 
+-        .cfi_def_cfa_offset 16
+-        .cfi_rel_offset D, 0
+-        .cfi_undefined  S
+-        .cfi_undefined  N
+-        .cfi_undefined  DAT0
+-        .cfi_rel_offset DAT1, 4
+-        .cfi_rel_offset DAT2, 8
+-        .cfi_undefined  LAST
+-        .cfi_rel_offset lr, 12
++        UNWIND( .fnstart )
++        UNWIND( .save {D, DAT1, DAT2, lr} )
+ 
+  .if backwards
+         add     D, D, N
+@@ -386,17 +381,11 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+ 
+         /* Long case */
+         push    {DAT3, DAT4, DAT5, DAT6, DAT7}
++        UNWIND( .fnend )
+ 
+-        .cfi_def_cfa_offset 36
+-        .cfi_rel_offset D, 20
+-        .cfi_rel_offset DAT1, 24
+-        .cfi_rel_offset DAT2, 28
+-        .cfi_rel_offset DAT3, 0
+-        .cfi_rel_offset DAT4, 4
+-        .cfi_rel_offset DAT5, 8
+-        .cfi_rel_offset DAT6, 12
+-        .cfi_rel_offset DAT7, 16
+-        .cfi_rel_offset lr, 32
++        UNWIND( .fnstart )
++        UNWIND( .save {D, DAT1, DAT2, lr} )
++        UNWIND( .save {DAT3, DAT4, DAT5, DAT6, DAT7} )
+ 
+         /* Adjust N so that the decrement instruction can also test for
+          * inner loop termination. We want it to stop when there are
+@@ -436,16 +425,10 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+ 156:    memcpy_long_inner_loop  backwards, 2
+ 157:    memcpy_long_inner_loop  backwards, 3
+ 
+-        .cfi_def_cfa_offset 16
+-        .cfi_rel_offset D, 0
+-        .cfi_rel_offset DAT1, 4
+-        .cfi_rel_offset DAT2, 8
+-        .cfi_same_value DAT3
+-        .cfi_same_value DAT4
+-        .cfi_same_value DAT5
+-        .cfi_same_value DAT6
+-        .cfi_same_value DAT7
+-        .cfi_rel_offset lr, 12
++        UNWIND( .fnend )
++
++        UNWIND( .fnstart )
++        UNWIND( .save {D, DAT1, DAT2, lr} )
+ 
+ 160:    /* Medium case */
+         preload_all  backwards, 0, 0, S, N, DAT2, OFF
+@@ -488,7 +471,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+         memcpy_short_inner_loop  backwards, 0
+ 140:    memcpy_short_inner_loop  backwards, 1
+ 
+-        .cfi_endproc
++        UNWIND( .fnend )
+ 
+         .unreq  D
+         .unreq  S
+--- a/arch/arm/lib/memmove_rpi.S
++++ b/arch/arm/lib/memmove_rpi.S
+@@ -27,6 +27,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBI
+ */
+ 
+ #include <linux/linkage.h>
++#include <asm/assembler.h>
++#include <asm/unwind.h>
+ #include "arm-mem.h"
+ #include "memcpymove.h"
+